6638083688 has 16 divisors (see below), whose sum is σ = 12510898980. Its totient is φ = 3301843968.

The previous prime is 6638083667. The next prime is 6638083691. The reversal of 6638083688 is 8863808366.

It can be written as a sum of positive squares in 2 ways, for example, as 5941018084 + 697065604 = 77078^2 + 26402^2 .

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, 2148095 + ... + 2151182.

Almost surely, 2^6638083688 is an apocalyptic number.

It is an amenable number.

6638083688 is a deficient number, since it is larger than the sum of its proper divisors (5872815292).

6638083688 is a wasteful number, since it uses less digits than its factorization.

6638083688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4299476 (or 4299472 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 56.

The square root of 6638083688 is about 81474.4357943030. The cubic root of 6638083688 is about 1879.3784432363.

The spelling of 6638083688 in words is "six billion, six hundred thirty-eight million, eighty-three thousand, six hundred eighty-eight".