6639601168 has 40 divisors (see below), whose sum is σ = 12940156152. Its totient is φ = 3300261888.

The previous prime is 6639601109. The next prime is 6639601201. The reversal of 6639601168 is 8611069366.

It can be written as a sum of positive squares in 4 ways, for example, as 2954139904 + 3685461264 = 54352^2 + 60708^2 .

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2535796 + ... + 2538412.

Almost surely, 2^6639601168 is an apocalyptic number.

It is an amenable number.

6639601168 is a deficient number, since it is larger than the sum of its proper divisors (6300554984).

6639601168 is a wasteful number, since it uses less digits than its factorization.

6639601168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3499 (or 3493 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 6639601168 is about 81483.7478764938. The cubic root of 6639601168 is about 1879.5216422901.

The spelling of 6639601168 in words is "six billion, six hundred thirty-nine million, six hundred one thousand, one hundred sixty-eight".