1066666656 has 192 divisors, whose sum is σ = 3149870976. Its totient is φ = 313344000.

The previous prime is 1066666637. The next prime is 1066666681. The reversal of 1066666656 is 6566666601.

It is a super-2 number, since 2×1066666656² = 2275555510044444672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7785820 + ... + 7785956.

It is an arithmetic number, because the mean of its divisors is an integer number (16405578).

Almost surely, 2^1066666656 is an apocalyptic number.

1066666656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1066666656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1574935488).

1066666656 is an abundant number, since it is smaller than the sum of its proper divisors (2083204320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1066666656 is a wasteful number, since it uses less digits than its factorization.

1066666656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 48.

The square root of 1066666656 is about 32659.8630738097. The cubic root of 1066666656 is about 1021.7459064523.

1066666656 divided by its sum of digits (48) gives a palindrome (22222222).

Subtracting 1066666656 from its reverse (6566666601), we obtain a palindrome (5499999945).

It can be divided in two parts, 10 and 66666656, that added together give a palindrome (66666666).

The spelling of 1066666656 in words is "one billion, sixty-six million, six hundred sixty-six thousand, six hundred fifty-six".