6638812870 has 8 divisors (see below), whose sum is σ = 11949863184. Its totient is φ = 2655525144.

The previous prime is 6638812823. The next prime is 6638812883. The reversal of 6638812870 is 782188366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331940634 + ... + 331940653.

It is an arithmetic number, because the mean of its divisors is an integer number (1493732898).

Almost surely, 2^6638812870 is an apocalyptic number.

6638812870 is a deficient number, since it is larger than the sum of its proper divisors (5311050314).

6638812870 is a wasteful number, since it uses less digits than its factorization.

6638812870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663881294.

The product of its (nonzero) digits is 774144, while the sum is 49.

The square root of 6638812870 is about 81478.9105842733. The cubic root of 6638812870 is about 1879.4472562060.

The spelling of 6638812870 in words is "six billion, six hundred thirty-eight million, eight hundred twelve thousand, eight hundred seventy".