664342008 has 32 divisors (see below), whose sum is σ = 1811842560. Its totient is φ = 201315680.

The previous prime is 664342001. The next prime is 664342009. The reversal of 664342008 is 800243466.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 664342008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664342001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1257960 + ... + 1258487.

It is an arithmetic number, because the mean of its divisors is an integer number (56620080).

Almost surely, 2^664342008 is an apocalyptic number.

It is an amenable number.

664342008 is an abundant number, since it is smaller than the sum of its proper divisors (1147500552).

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

664342008 is a wasteful number, since it uses less digits than its factorization.

664342008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516467 (or 2516463 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 664342008 is about 25774.8328413590. The cubic root of 664342008 is about 872.5638940300.

The spelling of 664342008 in words is "six hundred sixty-four million, three hundred forty-two thousand, eight".