664576663 has 8 divisors (see below), whose sum is σ = 679320000. Its totient is φ = 649858560.

The previous prime is 664576657. The next prime is 664576681. The reversal of 664576663 is 366675466.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664576663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664576603) 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, 53043 + ... + 64363.

It is an arithmetic number, because the mean of its divisors is an integer number (84915000).

Almost surely, 2^664576663 is an apocalyptic number.

664576663 is a deficient number, since it is larger than the sum of its proper divisors (14743337).

664576663 is a wasteful number, since it uses less digits than its factorization.

664576663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12617.

The product of its digits is 3265920, while the sum is 49.

The square root of 664576663 is about 25779.3844573527. The cubic root of 664576663 is about 872.6666159090. Note that the first 4 decimals are identical.

The spelling of 664576663 in words is "six hundred sixty-four million, five hundred seventy-six thousand, six hundred sixty-three".