6664155776 has 16 divisors (see below), whose sum is σ = 13276248090. Its totient is φ = 3332077824.

The previous prime is 6664155767. The next prime is 6664155811. The reversal of 6664155776 is 6775514666.

It can be written as a sum of positive squares in only one way, i.e., 4566515776 + 2097640000 = 67576^2 + 45800^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26031731 + ... + 26031986.

Almost surely, 2^6664155776 is an apocalyptic number.

It is an amenable number.

6664155776 is a deficient number, since it is larger than the sum of its proper divisors (6612092314).

6664155776 is an equidigital number, since it uses as much as digits as its factorization.

6664155776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52063731 (or 52063719 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 53.

The square root of 6664155776 is about 81634.2806423870. The cubic root of 6664155776 is about 1881.8357442335.

The spelling of 6664155776 in words is "six billion, six hundred sixty-four million, one hundred fifty-five thousand, seven hundred seventy-six".