621660120 has 32 divisors (see below), whose sum is σ = 1864980720. Its totient is φ = 165776000.

The previous prime is 621660113. The next prime is 621660187. The reversal of 621660120 is 21066126.

621660120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×621660120² = 772922609596828800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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, 2590131 + ... + 2590370.

Almost surely, 2^621660120 is an apocalyptic number.

621660120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

621660120 is an abundant number, since it is smaller than the sum of its proper divisors (1243320600).

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

621660120 is a wasteful number, since it uses less digits than its factorization.

621660120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5180515 (or 5180511 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 621660120 is about 24933.1129223769. The cubic root of 621660120 is about 853.4622885897.

The spelling of 621660120 in words is "six hundred twenty-one million, six hundred sixty thousand, one hundred twenty".