621706672 has 40 divisors (see below), whose sum is σ = 1230055200. Its totient is φ = 304335360.

The previous prime is 621706667. The next prime is 621706697. The reversal of 621706672 is 276607126.

621706672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167428 + ... + 171100.

It is an arithmetic number, because the mean of its divisors is an integer number (30751380).

Almost surely, 2^621706672 is an apocalyptic number.

It is an amenable number.

621706672 is a deficient number, since it is larger than the sum of its proper divisors (608348528).

621706672 is a wasteful number, since it uses less digits than its factorization.

621706672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3901 (or 3895 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 621706672 is about 24934.0464425652. The cubic root of 621706672 is about 853.4835914332.

The spelling of 621706672 in words is "six hundred twenty-one million, seven hundred six thousand, six hundred seventy-two".