6639933601 has 32 divisors (see below), whose sum is σ = 7947878400. Its totient is φ = 5542297488.

The previous prime is 6639933581. The next prime is 6639933697. The reversal of 6639933601 is 1063399366.

It is a de Polignac number, because none of the positive numbers 2^k-6639933601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6639934601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3594060 + ... + 3595906.

It is an arithmetic number, because the mean of its divisors is an integer number (248371200).

Almost surely, 2^6639933601 is an apocalyptic number.

It is an amenable number.

6639933601 is a deficient number, since it is larger than the sum of its proper divisors (1307944799).

6639933601 is a wasteful number, since it uses less digits than its factorization.

6639933601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138 (or 2124 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 46.

The square root of 6639933601 is about 81485.7877239952. The cubic root of 6639933601 is about 1879.5530098665.

It can be divided in two parts, 66399 and 33601, that added together give a 5-th power (100000 = 10⁵).

The spelling of 6639933601 in words is "six billion, six hundred thirty-nine million, nine hundred thirty-three thousand, six hundred one".