621066952764 has 60 divisors (see below), whose sum is σ = 1709043905800. Its totient is φ = 196126404192.

The previous prime is 621066952733. The next prime is 621066952769. The reversal of 621066952764 is 467259660126.

621066952764 is a `hidden beast` number, since 6 + 2 + 106 + 6 + 9 + 527 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 621066952764.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621066952769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 50437879 + ... + 50450190.

Almost surely, 2^621066952764 is an apocalyptic number.

It is an amenable number.

621066952764 is an abundant number, since it is smaller than the sum of its proper divisors (1087976953036).

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

621066952764 is a wasteful number, since it uses less digits than its factorization.

621066952764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100888104 (or 100888093 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 621066952764 in words is "six hundred twenty-one billion, sixty-six million, nine hundred fifty-two thousand, seven hundred sixty-four".