1156660656 has 20 divisors (see below), whose sum is σ = 2988040152. Its totient is φ = 385553536.

The previous prime is 1156660651. The next prime is 1156660667. The reversal of 1156660656 is 6560666511.

It is not an unprimeable number, because it can be changed into a prime (1156660651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12048501 + ... + 12048596.

Almost surely, 2^1156660656 is an apocalyptic number.

1156660656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1156660656 is an abundant number, since it is smaller than the sum of its proper divisors (1831379496).

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

1156660656 is a wasteful number, since it uses less digits than its factorization.

1156660656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24097108 (or 24097102 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 1156660656 is about 34009.7141416978. The cubic root of 1156660656 is about 1049.7083561899.

The spelling of 1156660656 in words is "one billion, one hundred fifty-six million, six hundred sixty thousand, six hundred fifty-six".