620664768 has 196 divisors, whose sum is σ = 1888940088. Its totient is φ = 202176000.

The previous prime is 620664767. The next prime is 620664853. The reversal of 620664768 is 867466026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620664763) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2472643 + ... + 2472893.

Almost surely, 2^620664768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620664768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (944470044).

620664768 is an abundant number, since it is smaller than the sum of its proper divisors (1268275320).

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

620664768 is an equidigital number, since it uses as much as digits as its factorization.

620664768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The square root of 620664768 is about 24913.1444823812. The cubic root of 620664768 is about 853.0065469642.

The spelling of 620664768 in words is "six hundred twenty million, six hundred sixty-four thousand, seven hundred sixty-eight".