664676608 has 36 divisors (see below), whose sum is σ = 1404810540. Its totient is φ = 312786944.

The previous prime is 664676603. The next prime is 664676641. The reversal of 664676608 is 806676466.

It can be written as a sum of positive squares in 2 ways, for example, as 294191104 + 370485504 = 17152^2 + 19248^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664676603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72013 + ... + 80716.

It is an arithmetic number, because the mean of its divisors is an integer number (39022515).

Almost surely, 2^664676608 is an apocalyptic number.

664676608 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

664676608 is an abundant number, since it is smaller than the sum of its proper divisors (740133932).

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

664676608 is a wasteful number, since it uses less digits than its factorization.

664676608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152762 (or 152748 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 49.

The square root of 664676608 is about 25781.3228520183. The cubic root of 664676608 is about 872.7103601941.

The spelling of 664676608 in words is "six hundred sixty-four million, six hundred seventy-six thousand, six hundred eight".