621650042166 has 32 divisors (see below), whose sum is σ = 1252060380000. Its totient is φ = 205757556480.

The previous prime is 621650042161. The next prime is 621650042171. The reversal of 621650042166 is 661240056126.

It is an interprime number because it is at equal distance from previous prime (621650042161) and next prime (621650042171).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621650042161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2611776 + ... + 2839836.

It is an arithmetic number, because the mean of its divisors is an integer number (39126886875).

Almost surely, 2^621650042166 is an apocalyptic number.

621650042166 is an abundant number, since it is smaller than the sum of its proper divisors (630410337834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621650042166 is a wasteful number, since it uses less digits than its factorization.

621650042166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231264.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 621650042166 in words is "six hundred twenty-one billion, six hundred fifty million, forty-two thousand, one hundred sixty-six".