7897433668 has 12 divisors (see below), whose sum is σ = 13828459372. Its totient is φ = 3946445280.

The previous prime is 7897433647. The next prime is 7897433669. The reversal of 7897433668 is 8663347987.

It can be written as a sum of positive squares in 2 ways, for example, as 806446404 + 7090987264 = 28398^2 + 84208^2 .

It is not an unprimeable number, because it can be changed into a prime (7897433669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560055 + ... + 573982.

Almost surely, 2^7897433668 is an apocalyptic number.

It is an amenable number.

7897433668 is a deficient number, since it is larger than the sum of its proper divisors (5931025704).

7897433668 is a wasteful number, since it uses less digits than its factorization.

7897433668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135782 (or 1135780 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 61.

The square root of 7897433668 is about 88867.5062550987. The cubic root of 7897433668 is about 1991.4160159850.

The spelling of 7897433668 in words is "seven billion, eight hundred ninety-seven million, four hundred thirty-three thousand, six hundred sixty-eight".