620664 has 32 divisors (see below), whose sum is σ = 1693440. Its totient is φ = 188000.

The previous prime is 620663. The next prime is 620671. The reversal of 620664 is 466026.

620664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 912 + ... + 1439.

It is an arithmetic number, because the mean of its divisors is an integer number (52920).

2⁶²⁰⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

620664 is an abundant number, since it is smaller than the sum of its proper divisors (1072776).

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

620664 is a wasteful number, since it uses less digits than its factorization.

620664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2371 (or 2367 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 620664 is about 787.8223149924. The cubic root of 620664 is about 85.3006195132.

The spelling of 620664 in words is "six hundred twenty thousand, six hundred sixty-four".