6668683508 has 6 divisors (see below), whose sum is σ = 11670196146. Its totient is φ = 3334341752.

The previous prime is 6668683499. The next prime is 6668683519. The reversal of 6668683508 is 8053868666.

It can be written as a sum of positive squares in only one way, i.e., 6376341904 + 292341604 = 79852^2 + 17098^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833585435 + ... + 833585442.

It is an arithmetic number, because the mean of its divisors is an integer number (1945032691).

Almost surely, 2^6668683508 is an apocalyptic number.

It is an amenable number.

6668683508 is a deficient number, since it is larger than the sum of its proper divisors (5001512638).

6668683508 is a wasteful number, since it uses less digits than its factorization.

6668683508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667170881 (or 1667170879 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 56.

The square root of 6668683508 is about 81662.0077392174. The cubic root of 6668683508 is about 1882.2618306622.

The spelling of 6668683508 in words is "six billion, six hundred sixty-eight million, six hundred eighty-three thousand, five hundred eight".