621662220 has 72 divisors (see below), whose sum is σ = 1946555520. Its totient is φ = 160427520.

The previous prime is 621662191. The next prime is 621662243. The reversal of 621662220 is 22266126.

621662220 is a `hidden beast` number, since 6 + 2 + 16 + 622 + 20 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50125 + ... + 61284.

Almost surely, 2^621662220 is an apocalyptic number.

621662220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

621662220 is an abundant number, since it is smaller than the sum of its proper divisors (1324893300).

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

621662220 is a wasteful number, since it uses less digits than its factorization.

621662220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111455 (or 111450 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 621662220 is about 24933.1550350131. The cubic root of 621662220 is about 853.4632496019.

The spelling of 621662220 in words is "six hundred twenty-one million, six hundred sixty-two thousand, two hundred twenty".