1005660656 has 80 divisors (see below), whose sum is σ = 2616165888. Its totient is φ = 361670400.

The previous prime is 1005660613. The next prime is 1005660673. The reversal of 1005660656 is 6560665001.

It is a super-2 number, since 2×1005660656² = 2022706710052700672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 15380 + ... + 47411.

Almost surely, 2^1005660656 is an apocalyptic number.

1005660656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1005660656 is an abundant number, since it is smaller than the sum of its proper divisors (1610505232).

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

1005660656 is a wasteful number, since it uses less digits than its factorization.

1005660656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62830 (or 62824 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 1005660656 is about 31712.1531277837. The cubic root of 1005660656 is about 1001.8833361516.

The spelling of 1005660656 in words is "one billion, five million, six hundred sixty thousand, six hundred fifty-six".