7797667977 has 36 divisors (see below), whose sum is σ = 12404897232. Its totient is φ = 4716478800.

The previous prime is 7797667949. The next prime is 7797667979.

7797667977 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7797667977 - 2²⁰ = 7796619401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7797667979) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 562702 + ... + 576392.

Almost surely, 2^7797667977 is an apocalyptic number.

It is an amenable number.

7797667977 is a deficient number, since it is larger than the sum of its proper divisors (4607229255).

7797667977 is a wasteful number, since it uses less digits than its factorization.

7797667977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14242 (or 14228 counting only the distinct ones).

The product of its digits is 343064484, while the sum is 72.

The square root of 7797667977 is about 88304.4051958904. The cubic root of 7797667977 is about 1982.9948197975.

The spelling of 7797667977 in words is "seven billion, seven hundred ninety-seven million, six hundred sixty-seven thousand, nine hundred seventy-seven".