664960605 has 8 divisors (see below), whose sum is σ = 1063936992. Its totient is φ = 354645648.

The previous prime is 664960603. The next prime is 664960657. The reversal of 664960605 is 506069466.

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

It is not a de Polignac number, because 664960605 - 2¹ = 664960603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664960603) 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, 22165339 + ... + 22165368.

It is an arithmetic number, because the mean of its divisors is an integer number (132992124).

Almost surely, 2^664960605 is an apocalyptic number.

It is an amenable number.

664960605 is a deficient number, since it is larger than the sum of its proper divisors (398976387).

664960605 is a wasteful number, since it uses less digits than its factorization.

664960605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44330715.

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 664960605 is about 25786.8300688549. The cubic root of 664960605 is about 872.8346370882.

The spelling of 664960605 in words is "six hundred sixty-four million, nine hundred sixty thousand, six hundred five".