6720904964 has 6 divisors (see below), whose sum is σ = 11761583694. Its totient is φ = 3360452480.

The previous prime is 6720904961. The next prime is 6720904969. The reversal of 6720904964 is 4694090276.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6441346564 + 279558400 = 80258^2 + 16720^2 .

It is not an unprimeable number, because it can be changed into a prime (6720904961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840113117 + ... + 840113124.

It is an arithmetic number, because the mean of its divisors is an integer number (1960263949).

Almost surely, 2^6720904964 is an apocalyptic number.

It is an amenable number.

6720904964 is a deficient number, since it is larger than the sum of its proper divisors (5040678730).

6720904964 is a wasteful number, since it uses less digits than its factorization.

6720904964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680226245 (or 1680226243 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 6720904964 is about 81981.1256570682. The cubic root of 6720904964 is about 1887.1622975152.

The spelling of 6720904964 in words is "six billion, seven hundred twenty million, nine hundred four thousand, nine hundred sixty-four".