6628478512 has 20 divisors (see below), whose sum is σ = 12845160496. Its totient is φ = 3313598400.

The previous prime is 6628478477. The next prime is 6628478513. The reversal of 6628478512 is 2158748266.

It is not an unprimeable number, because it can be changed into a prime (6628478513) 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, 51637 + ... + 126187.

Almost surely, 2^6628478512 is an apocalyptic number.

It is an amenable number.

6628478512 is a deficient number, since it is larger than the sum of its proper divisors (6216681984).

6628478512 is a wasteful number, since it uses less digits than its factorization.

6628478512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80116 (or 80110 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 49.

The square root of 6628478512 is about 81415.4685056839. The cubic root of 6628478512 is about 1878.4715311705.

The spelling of 6628478512 in words is "six billion, six hundred twenty-eight million, four hundred seventy-eight thousand, five hundred twelve".