6639855334 has 16 divisors (see below), whose sum is σ = 11389644288. Its totient is φ = 2843893512.

The previous prime is 6639855269. The next prime is 6639855401. The reversal of 6639855334 is 4335589366.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122974 + ... + 168529.

It is an arithmetic number, because the mean of its divisors is an integer number (711852768).

Almost surely, 2^6639855334 is an apocalyptic number.

6639855334 is a deficient number, since it is larger than the sum of its proper divisors (4749788954).

6639855334 is a wasteful number, since it uses less digits than its factorization.

6639855334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293139.

The product of its digits is 6998400, while the sum is 52.

The square root of 6639855334 is about 81485.3074731881. The cubic root of 6639855334 is about 1879.5456248753.

The spelling of 6639855334 in words is "six billion, six hundred thirty-nine million, eight hundred fifty-five thousand, three hundred thirty-four".