64320663 has 8 divisors (see below), whose sum is σ = 93557376. Its totient is φ = 38982200.

The previous prime is 64320653. The next prime is 64320667. The reversal of 64320663 is 36602346.

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 64320663 - 2⁵ = 64320631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64320663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64320667) 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, 974523 + ... + 974588.

It is an arithmetic number, because the mean of its divisors is an integer number (11694672).

Almost surely, 2^64320663 is an apocalyptic number.

64320663 is a deficient number, since it is larger than the sum of its proper divisors (29236713).

64320663 is a wasteful number, since it uses less digits than its factorization.

64320663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949125.

The product of its (nonzero) digits is 15552, while the sum is 30.

The square root of 64320663 is about 8020.0163964920. The cubic root of 64320663 is about 400.6669352919. Note that the first 3 decimals are identical.

The spelling of 64320663 in words is "sixty-four million, three hundred twenty thousand, six hundred sixty-three".