63664523 has 8 divisors (see below), whose sum is σ = 68663616. Its totient is φ = 58680000.

The previous prime is 63664487. The next prime is 63664537. The reversal of 63664523 is 32546636.

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 63664523 - 2²² = 59470219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63664583) 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, 6503 + ... + 13023.

It is an arithmetic number, because the mean of its divisors is an integer number (8582952).

Almost surely, 2^63664523 is an apocalyptic number.

63664523 is a deficient number, since it is larger than the sum of its proper divisors (4999093).

63664523 is a wasteful number, since it uses less digits than its factorization.

63664523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7285.

The product of its digits is 77760, while the sum is 35.

The square root of 63664523 is about 7979.0051384869. The cubic root of 63664523 is about 399.2998648252.

The spelling of 63664523 in words is "sixty-three million, six hundred sixty-four thousand, five hundred twenty-three".