6620402113605 has 24 divisors (see below), whose sum is σ = 13114701330432. Its totient is φ = 3026469537504.

The previous prime is 6620402113597. The next prime is 6620402113673. The reversal of 6620402113605 is 5063112040266.

6620402113605 is a `hidden beast` number, since 6 + 6 + 2 + 0 + 40 + 2 + 1 + 1 + 3 + 605 = 666.

It is not a de Polignac number, because 6620402113605 - 2³ = 6620402113597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6620402113605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10508574469 + ... + 10508575098.

It is an arithmetic number, because the mean of its divisors is an integer number (546445888768).

Almost surely, 2^{6620402113605} is an apocalyptic number.

It is an amenable number.

6620402113605 is a deficient number, since it is larger than the sum of its proper divisors (6494299216827).

6620402113605 is a wasteful number, since it uses less digits than its factorization.

6620402113605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21017149585 (or 21017149582 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 6620402113605 in words is "six trillion, six hundred twenty billion, four hundred two million, one hundred thirteen thousand, six hundred five".