1066656 has 48 divisors (see below), whose sum is σ = 2878848. Its totient is φ = 345600.

The previous prime is 1066651. The next prime is 1066669. The reversal of 1066656 is 6566601.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×1066656² = 2275510044672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1066651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3801 + ... + 4071.

It is an arithmetic number, because the mean of its divisors is an integer number (59976).

2^1066656 is an apocalyptic number.

1066656 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 1066656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1439424).

1066656 is an abundant number, since it is smaller than the sum of its proper divisors (1812192).

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

1066656 is a wasteful number, since it uses less digits than its factorization.

1066656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 1066656 is about 1032.7903949979. The cubic root of 1066656 is about 102.1742504027.

Subtracting 1066656 from its reverse (6566601), we obtain a palindrome (5499945).

It can be divided in two parts, 10 and 66656, that added together give a palindrome (66666).

The spelling of 1066656 in words is "one million, sixty-six thousand, six hundred fifty-six".