621684676 has 12 divisors (see below), whose sum is σ = 1088201772. Its totient is φ = 310769888.

The previous prime is 621684653. The next prime is 621684683. The reversal of 621684676 is 676486126.

It can be written as a sum of positive squares in 2 ways, for example, as 393070276 + 228614400 = 19826^2 + 15120^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4266 + ... + 35518.

It is an arithmetic number, because the mean of its divisors is an integer number (90683481).

Almost surely, 2^621684676 is an apocalyptic number.

It is an amenable number.

621684676 is a deficient number, since it is larger than the sum of its proper divisors (466517096).

621684676 is a wasteful number, since it uses less digits than its factorization.

621684676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36230 (or 36228 counting only the distinct ones).

The product of its digits is 580608, while the sum is 46.

The square root of 621684676 is about 24933.6053550224. The cubic root of 621684676 is about 853.4735258898.

The spelling of 621684676 in words is "six hundred twenty-one million, six hundred eighty-four thousand, six hundred seventy-six".