6356997665 has 16 divisors (see below), whose sum is σ = 7840248768. Its totient is φ = 4945407936.

The previous prime is 6356997641. The next prime is 6356997683. The reversal of 6356997665 is 5667996536.

It is a cyclic number.

It is not a de Polignac number, because 6356997665 - 2¹⁰ = 6356996641 is a prime.

It is a super-2 number, since 2×6356997665² = 80822838625630904450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6356997598 and 6356997607.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16322 + ... + 113931.

It is an arithmetic number, because the mean of its divisors is an integer number (490015548).

Almost surely, 2^6356997665 is an apocalyptic number.

It is an amenable number.

6356997665 is a deficient number, since it is larger than the sum of its proper divisors (1483251103).

6356997665 is a wasteful number, since it uses less digits than its factorization.

6356997665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130528.

The product of its digits is 55112400, while the sum is 62.

The square root of 6356997665 is about 79730.7824180849. The cubic root of 6356997665 is about 1852.4678693320.

The spelling of 6356997665 in words is "six billion, three hundred fifty-six million, nine hundred ninety-seven thousand, six hundred sixty-five".