664654117 has 8 divisors (see below), whose sum is σ = 703999296. Its totient is φ = 625336512.

The previous prime is 664654073. The next prime is 664654153. The reversal of 664654117 is 711456466.

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

It is a cyclic number.

It is not a de Polignac number, because 664654117 - 2⁷ = 664653989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 664654117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664654187) 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, 63168 + ... + 72934.

It is an arithmetic number, because the mean of its divisors is an integer number (87999912).

Almost surely, 2^664654117 is an apocalyptic number.

It is an amenable number.

664654117 is a deficient number, since it is larger than the sum of its proper divisors (39345179).

664654117 is a wasteful number, since it uses less digits than its factorization.

664654117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13787.

The product of its digits is 120960, while the sum is 40.

The square root of 664654117 is about 25780.8866604700. The cubic root of 664654117 is about 872.7005166352.

The spelling of 664654117 in words is "six hundred sixty-four million, six hundred fifty-four thousand, one hundred seventeen".