664502054 has 4 divisors (see below), whose sum is σ = 996753084. Its totient is φ = 332251026.

The previous prime is 664502017. The next prime is 664502063. The reversal of 664502054 is 450205466.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 664502054.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166125512 + ... + 166125515.

It is an arithmetic number, because the mean of its divisors is an integer number (249188271).

Almost surely, 2^664502054 is an apocalyptic number.

664502054 is a deficient number, since it is larger than the sum of its proper divisors (332251030).

664502054 is a wasteful number, since it uses less digits than its factorization.

664502054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332251029.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 664502054 is about 25777.9373496019. The cubic root of 664502054 is about 872.6339579160.

The spelling of 664502054 in words is "six hundred sixty-four million, five hundred two thousand, fifty-four".