6639698470 has 16 divisors (see below), whose sum is σ = 12274470288. Its totient is φ = 2584098720.

The previous prime is 6639698453. The next prime is 6639698479. The reversal of 6639698470 is 748969366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6639698479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8972196 + ... + 8972935.

It is an arithmetic number, because the mean of its divisors is an integer number (767154393).

Almost surely, 2^6639698470 is an apocalyptic number.

6639698470 is a deficient number, since it is larger than the sum of its proper divisors (5634771818).

6639698470 is a wasteful number, since it uses less digits than its factorization.

6639698470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17945175.

The product of its (nonzero) digits is 11757312, while the sum is 58.

The square root of 6639698470 is about 81484.3449381536. The cubic root of 6639698470 is about 1879.5308235806.

The spelling of 6639698470 in words is "six billion, six hundred thirty-nine million, six hundred ninety-eight thousand, four hundred seventy".