7971373665 has 24 divisors (see below), whose sum is σ = 14111031168. Its totient is φ = 4160942880.

The previous prime is 7971373651. The next prime is 7971373667. The reversal of 7971373665 is 5663731797.

It is not a de Polignac number, because 7971373665 - 2⁸ = 7971373409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7971373667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1882371 + ... + 1886600.

It is an arithmetic number, because the mean of its divisors is an integer number (587959632).

Almost surely, 2^7971373665 is an apocalyptic number.

It is an amenable number.

7971373665 is a deficient number, since it is larger than the sum of its proper divisors (6139657503).

7971373665 is a wasteful number, since it uses less digits than its factorization.

7971373665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3769029 (or 3769026 counting only the distinct ones).

The product of its digits is 5000940, while the sum is 54.

The square root of 7971373665 is about 89282.5496107722. The cubic root of 7971373665 is about 1997.6116210417.

The spelling of 7971373665 in words is "seven billion, nine hundred seventy-one million, three hundred seventy-three thousand, six hundred sixty-five".