664934460 has 36 divisors (see below), whose sum is σ = 1862375928. Its totient is φ = 177262592.

The previous prime is 664934429. The next prime is 664934461. The reversal of 664934460 is 64439466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664934461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198076 + ... + 201404.

Almost surely, 2^664934460 is an apocalyptic number.

664934460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

664934460 is an abundant number, since it is smaller than the sum of its proper divisors (1197441468).

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

664934460 is an equidigital number, since it uses as much as digits as its factorization.

664934460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6670 (or 3339 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 42.

The square root of 664934460 is about 25786.3231190490. The cubic root of 664934460 is about 872.8231975330.

The spelling of 664934460 in words is "six hundred sixty-four million, nine hundred thirty-four thousand, four hundred sixty".