6521604076 has 24 divisors (see below), whose sum is σ = 12302876880. Its totient is φ = 3006992832.

The previous prime is 6521604043. The next prime is 6521604077. The reversal of 6521604076 is 6704061256.

It is a happy number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (6521604077) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 8551 + ... + 114526.

It is an arithmetic number, because the mean of its divisors is an integer number (512619870).

Almost surely, 2^6521604076 is an apocalyptic number.

It is an amenable number.

6521604076 is a deficient number, since it is larger than the sum of its proper divisors (5781272804).

6521604076 is a wasteful number, since it uses less digits than its factorization.

6521604076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124113 (or 124111 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 6521604076 is about 80756.4491294658. The cubic root of 6521604076 is about 1868.3209189460.

The spelling of 6521604076 in words is "six billion, five hundred twenty-one million, six hundred four thousand, seventy-six".