650775664 has 120 divisors (see below), whose sum is σ = 1628467200. Its totient is φ = 249056640.

The previous prime is 650775637. The next prime is 650775673. The reversal of 650775664 is 466577056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 508177 + ... + 509455.

It is an arithmetic number, because the mean of its divisors is an integer number (13570560).

Almost surely, 2^650775664 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 650775664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (814233600).

650775664 is an abundant number, since it is smaller than the sum of its proper divisors (977691536).

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

650775664 is a wasteful number, since it uses less digits than its factorization.

650775664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371 (or 1358 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 46.

The square root of 650775664 is about 25510.3050550165. The cubic root of 650775664 is about 866.5835378518.

The spelling of 650775664 in words is "six hundred fifty million, seven hundred seventy-five thousand, six hundred sixty-four".