664107394 has 8 divisors (see below), whose sum is σ = 1019327760. Its totient is φ = 324331476.

The previous prime is 664107391. The next prime is 664107407. The reversal of 664107394 is 493701466.

664107394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (664107391) 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, 3861004 + ... + 3861175.

It is an arithmetic number, because the mean of its divisors is an integer number (127415970).

Almost surely, 2^664107394 is an apocalyptic number.

664107394 is a deficient number, since it is larger than the sum of its proper divisors (355220366).

664107394 is a wasteful number, since it uses less digits than its factorization.

664107394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7722224.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 664107394 is about 25770.2812169367. The cubic root of 664107394 is about 872.4611659139.

The spelling of 664107394 in words is "six hundred sixty-four million, one hundred seven thousand, three hundred ninety-four".