620661164 has 24 divisors (see below), whose sum is σ = 1154774880. Its totient is φ = 291234944.

The previous prime is 620661113. The next prime is 620661227. The reversal of 620661164 is 461166026.

It is a self number, because there is not a number n which added to its sum of digits gives 620661164.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58769 + ... + 68520.

It is an arithmetic number, because the mean of its divisors is an integer number (48115620).

Almost surely, 2^620661164 is an apocalyptic number.

It is an amenable number.

620661164 is a deficient number, since it is larger than the sum of its proper divisors (534113716).

620661164 is a wasteful number, since it uses less digits than its factorization.

620661164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127369 (or 127367 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 620661164 is about 24913.0721509813. The cubic root of 620661164 is about 853.0048959165.

The spelling of 620661164 in words is "six hundred twenty million, six hundred sixty-one thousand, one hundred sixty-four".