1165680657 has 12 divisors (see below), whose sum is σ = 1684949760. Its totient is φ = 776571768.

The previous prime is 1165680653. The next prime is 1165680661. The reversal of 1165680657 is 7560865611.

It is an interprime number because it is at equal distance from previous prime (1165680653) and next prime (1165680661).

It is not a de Polignac number, because 1165680657 - 2² = 1165680653 is a prime.

It is a super-2 number, since 2×1165680657² = 2717622788207903298, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1165680653) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 32053 + ... + 57954.

It is an arithmetic number, because the mean of its divisors is an integer number (140412480).

Almost surely, 2^1165680657 is an apocalyptic number.

It is an amenable number.

1165680657 is a deficient number, since it is larger than the sum of its proper divisors (519269103).

1165680657 is a wasteful number, since it uses less digits than its factorization.

1165680657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91452 (or 91449 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 1165680657 is about 34142.0657986596. The cubic root of 1165680657 is about 1052.4299449914.

The spelling of 1165680657 in words is "one billion, one hundred sixty-five million, six hundred eighty thousand, six hundred fifty-seven".