621616662 has 48 divisors (see below), whose sum is σ = 1460873232. Its totient is φ = 190256640.

The previous prime is 621616649. The next prime is 621616663. The reversal of 621616662 is 266616126.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621616663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12228 + ... + 37319.

It is an arithmetic number, because the mean of its divisors is an integer number (30434859).

Almost surely, 2^621616662 is an apocalyptic number.

621616662 is an abundant number, since it is smaller than the sum of its proper divisors (839256570).

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

621616662 is a wasteful number, since it uses less digits than its factorization.

621616662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49613 (or 49610 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 621616662 is about 24932.2414154845. The cubic root of 621616662 is about 853.4424006438.

The spelling of 621616662 in words is "six hundred twenty-one million, six hundred sixteen thousand, six hundred sixty-two".