6939604664 has 8 divisors (see below), whose sum is σ = 13011758760. Its totient is φ = 3469802328.

The previous prime is 6939604627. The next prime is 6939604687. The reversal of 6939604664 is 4664069396.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×6939604664² = 96316225785221105792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433725284 + ... + 433725299.

It is an arithmetic number, because the mean of its divisors is an integer number (1626469845).

Almost surely, 2^6939604664 is an apocalyptic number.

It is an amenable number.

6939604664 is a deficient number, since it is larger than the sum of its proper divisors (6072154096).

6939604664 is a wasteful number, since it uses less digits than its factorization.

6939604664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867450589 (or 867450585 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 53.

The square root of 6939604664 is about 83304.2895894323. The cubic root of 6939604664 is about 1907.4137546713.

The spelling of 6939604664 in words is "six billion, nine hundred thirty-nine million, six hundred four thousand, six hundred sixty-four".