621660422 has 16 divisors (see below), whose sum is σ = 1004424192. Its totient is φ = 287724360.

The previous prime is 621660367. The next prime is 621660439. The reversal of 621660422 is 224066126.

It is a super-3 number, since 3×621660422³ (a number of 27 digits) contains 333 as substring.

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, 216548 + ... + 219399.

It is an arithmetic number, because the mean of its divisors is an integer number (62776512).

Almost surely, 2^621660422 is an apocalyptic number.

621660422 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

621660422 is a deficient number, since it is larger than the sum of its proper divisors (382763770).

621660422 is a wasteful number, since it uses less digits than its factorization.

621660422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436003.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 621660422 is about 24933.1189785795. The cubic root of 621660422 is about 853.4624267925.

The spelling of 621660422 in words is "six hundred twenty-one million, six hundred sixty thousand, four hundred twenty-two".