650471664 has 80 divisors (see below), whose sum is σ = 1740638592. Its totient is φ = 209174784.

The previous prime is 650471617. The next prime is 650471687. The reversal of 650471664 is 466174056.

It is a super-2 number, since 2×650471664² = 846226771333857792, which contains 22 as substring.

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, 169414 + ... + 173210.

Almost surely, 2^650471664 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 650471664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (870319296).

650471664 is an abundant number, since it is smaller than the sum of its proper divisors (1090166928).

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

650471664 is a wasteful number, since it uses less digits than its factorization.

650471664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3934 (or 3928 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 650471664 is about 25504.3459825968. The cubic root of 650471664 is about 866.4485797080.

The spelling of 650471664 in words is "six hundred fifty million, four hundred seventy-one thousand, six hundred sixty-four".