620665620 has 48 divisors (see below), whose sum is σ = 1753825920. Its totient is φ = 163990656.

The previous prime is 620665613. The next prime is 620665673. The reversal of 620665620 is 26566026.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40912 + ... + 53991.

It is an arithmetic number, because the mean of its divisors is an integer number (36538040).

Almost surely, 2^620665620 is an apocalyptic number.

620665620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

620665620 is an abundant number, since it is smaller than the sum of its proper divisors (1133160300).

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

620665620 is a wasteful number, since it uses less digits than its factorization.

620665620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95024 (or 95022 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 620665620 is about 24913.1615817824. The cubic root of 620665620 is about 853.0069372776.

The spelling of 620665620 in words is "six hundred twenty million, six hundred sixty-five thousand, six hundred twenty".