620516660 has 48 divisors (see below), whose sum is σ = 1411857216. Its totient is φ = 228168192.

The previous prime is 620516597. The next prime is 620516671. The reversal of 620516660 is 66615026.

620516660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 6602 + ... + 35841.

It is an arithmetic number, because the mean of its divisors is an integer number (29413692).

Almost surely, 2^620516660 is an apocalyptic number.

It is an amenable number.

620516660 is an abundant number, since it is smaller than the sum of its proper divisors (791340556).

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

620516660 is a wasteful number, since it uses less digits than its factorization.

620516660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42512 (or 42510 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 620516660 is about 24910.1718179542. The cubic root of 620516660 is about 852.9386911475.

The spelling of 620516660 in words is "six hundred twenty million, five hundred sixteen thousand, six hundred sixty".