620661516 has 12 divisors (see below), whose sum is σ = 1448210232. Its totient is φ = 206887168.

The previous prime is 620661511. The next prime is 620661529. The reversal of 620661516 is 615166026.

620661516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (620661511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25860885 + ... + 25860908.

It is an arithmetic number, because the mean of its divisors is an integer number (120684186).

Almost surely, 2^620661516 is an apocalyptic number.

It is an amenable number.

620661516 is an abundant number, since it is smaller than the sum of its proper divisors (827548716).

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

620661516 is a wasteful number, since it uses less digits than its factorization.

620661516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51721800 (or 51721798 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 620661516 is about 24913.0792155446. The cubic root of 620661516 is about 853.0050571734.

The spelling of 620661516 in words is "six hundred twenty million, six hundred sixty-one thousand, five hundred sixteen".