621044865066 has 8 divisors (see below), whose sum is σ = 1242089730144. Its totient is φ = 207014955020.

The previous prime is 621044865059. The next prime is 621044865109. The reversal of 621044865066 is 660568440126.

It is a sphenic number, since it is the product of 3 distinct primes.

621044865066 is an admirable number.

It is a super-2 number, since 2×621044865066² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51753738750 + ... + 51753738761.

It is an arithmetic number, because the mean of its divisors is an integer number (155261216268).

Almost surely, 2^621044865066 is an apocalyptic number.

621044865066 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

621044865066 is a wasteful number, since it uses less digits than its factorization.

621044865066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103507477516.

The product of its (nonzero) digits is 1658880, while the sum is 48.

The spelling of 621044865066 in words is "six hundred twenty-one billion, forty-four million, eight hundred sixty-five thousand, sixty-six".