664366080 has 352 divisors, whose sum is σ = 2509065216. Its totient is φ = 146866176.

The previous prime is 664366061. The next prime is 664366093. The reversal of 664366080 is 80663466.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3978157 + ... + 3978323.

Almost surely, 2^664366080 is an apocalyptic number.

664366080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664366080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1254532608).

664366080 is an abundant number, since it is smaller than the sum of its proper divisors (1844699136).

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

664366080 is a wasteful number, since it uses less digits than its factorization.

664366080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 664366080 is about 25775.2998042700. The cubic root of 664366080 is about 872.5744328308.

The spelling of 664366080 in words is "six hundred sixty-four million, three hundred sixty-six thousand, eighty".