7896666987 has 12 divisors (see below), whose sum is σ = 12443232984. Its totient is φ = 4785858720.

The previous prime is 7896666979. The next prime is 7896667019.

7896666987 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7896666987 - 2³ = 7896666979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7896666937) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39882058 + ... + 39882255.

It is an arithmetic number, because the mean of its divisors is an integer number (1036936082).

Almost surely, 2^7896666987 is an apocalyptic number.

7896666987 is a deficient number, since it is larger than the sum of its proper divisors (4546565997).

7896666987 is a wasteful number, since it uses less digits than its factorization.

7896666987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79764330 (or 79764327 counting only the distinct ones).

The product of its digits is 329204736, while the sum is 72.

The square root of 7896666987 is about 88863.1925321165. The cubic root of 7896666987 is about 1991.3515718336.

The spelling of 7896666987 in words is "seven billion, eight hundred ninety-six million, six hundred sixty-six thousand, nine hundred eighty-seven".