621706676 has 12 divisors (see below), whose sum is σ = 1145249280. Its totient is φ = 294492600.

The previous prime is 621706667. The next prime is 621706697. The reversal of 621706676 is 676607126.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4090100 + ... + 4090251.

It is an arithmetic number, because the mean of its divisors is an integer number (95437440).

Almost surely, 2^621706676 is an apocalyptic number.

It is an amenable number.

621706676 is a deficient number, since it is larger than the sum of its proper divisors (523542604).

621706676 is a wasteful number, since it uses less digits than its factorization.

621706676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8180374 (or 8180372 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 621706676 is about 24934.0465227768. The cubic root of 621706676 is about 853.4835932636.

The spelling of 621706676 in words is "six hundred twenty-one million, seven hundred six thousand, six hundred seventy-six".