6579799902621 has 12 divisors (see below), whose sum is σ = 10368169543680. Its totient is φ = 3987757516680.

The previous prime is 6579799902617. The next prime is 6579799902661. The reversal of 6579799902621 is 1262099979756.

6579799902621 is a `hidden beast` number, since 6 + 579 + 7 + 9 + 9 + 9 + 0 + 26 + 21 = 666.

It is not a de Polignac number, because 6579799902621 - 2² = 6579799902617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6579799902621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6579799902661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33231312541 + ... + 33231312738.

It is an arithmetic number, because the mean of its divisors is an integer number (864014128640).

Almost surely, 2^{6579799902621} is an apocalyptic number.

It is an amenable number.

6579799902621 is a deficient number, since it is larger than the sum of its proper divisors (3788369641059).

6579799902621 is a wasteful number, since it uses less digits than its factorization.

6579799902621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66462625296 (or 66462625293 counting only the distinct ones).

The product of its (nonzero) digits is 231472080, while the sum is 72.

The spelling of 6579799902621 in words is "six trillion, five hundred seventy-nine billion, seven hundred ninety-nine million, nine hundred two thousand, six hundred twenty-one".