1066636656 has 60 divisors (see below), whose sum is σ = 3001850280. Its totient is φ = 353550720.

The previous prime is 1066636651. The next prime is 1066636657. The reversal of 1066636656 is 6566366601.

It is a super-2 number, since 2×1066636656² = 2275427511845724672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066636651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5086 + ... + 46466.

It is an arithmetic number, because the mean of its divisors is an integer number (50030838).

Almost surely, 2^1066636656 is an apocalyptic number.

1066636656 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 1066636656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1500925140).

1066636656 is an abundant number, since it is smaller than the sum of its proper divisors (1935213624).

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

1066636656 is a wasteful number, since it uses less digits than its factorization.

1066636656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41574 (or 41565 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 45.

The square root of 1066636656 is about 32659.4037912513. The cubic root of 1066636656 is about 1021.7363274945.

The spelling of 1066636656 in words is "one billion, sixty-six million, six hundred thirty-six thousand, six hundred fifty-six".