3997660799 has 6 divisors (see below), whose sum is σ = 4394123160. Its totient is φ = 3634236980.

The previous prime is 3997660757. The next prime is 3997660837. The reversal of 3997660799 is 9970667993.

It is not a de Polignac number, because 3997660799 - 2²⁸ = 3729225343 is a prime.

It is a super-2 number, since 2×3997660799² = 31962583727722636802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997660729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16519139 + ... + 16519380.

It is an arithmetic number, because the mean of its divisors is an integer number (732353860).

Almost surely, 2^3997660799 is an apocalyptic number.

3997660799 is a deficient number, since it is larger than the sum of its proper divisors (396462361).

3997660799 is a wasteful number, since it uses less digits than its factorization.

3997660799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33038541 (or 33038530 counting only the distinct ones).

The product of its (nonzero) digits is 34720812, while the sum is 65.

The square root of 3997660799 is about 63227.0574912355. The cubic root of 3997660799 is about 1587.0915541182.

The spelling of 3997660799 in words is "three billion, nine hundred ninety-seven million, six hundred sixty thousand, seven hundred ninety-nine".