663660527 has 8 divisors (see below), whose sum is σ = 691772976. Its totient is φ = 636083712.

The previous prime is 663660523. The next prime is 663660551. The reversal of 663660527 is 725066366.

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 663660527 - 2² = 663660523 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 (663660521) 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, 131378 + ... + 136335.

It is an arithmetic number, because the mean of its divisors is an integer number (86471622).

Almost surely, 2^663660527 is an apocalyptic number.

663660527 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

663660527 is a deficient number, since it is larger than the sum of its proper divisors (28112449).

663660527 is a wasteful number, since it uses less digits than its factorization.

663660527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267817.

The product of its (nonzero) digits is 272160, while the sum is 41.

The square root of 663660527 is about 25761.6095576344. The cubic root of 663660527 is about 872.2654337242.

The spelling of 663660527 in words is "six hundred sixty-three million, six hundred sixty thousand, five hundred twenty-seven".