6396665475 has 12 divisors (see below), whose sum is σ = 10575820376. Its totient is φ = 3411554880.

The previous prime is 6396665437. The next prime is 6396665491. The reversal of 6396665475 is 5745666936.

It is not a de Polignac number, because 6396665475 - 2¹² = 6396661379 is a prime.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42644362 + ... + 42644511.

Almost surely, 2^6396665475 is an apocalyptic number.

6396665475 is a deficient number, since it is larger than the sum of its proper divisors (4179154901).

6396665475 is a wasteful number, since it uses less digits than its factorization.

6396665475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85288886 (or 85288881 counting only the distinct ones).

The product of its digits is 24494400, while the sum is 57.

The square root of 6396665475 is about 79979.1565034291. The cubic root of 6396665475 is about 1856.3130296366.

The spelling of 6396665475 in words is "six billion, three hundred ninety-six million, six hundred sixty-five thousand, four hundred seventy-five".