664562423 has 16 divisors (see below), whose sum is σ = 769527360. Its totient is φ = 562139136.

The previous prime is 664562401. The next prime is 664562441. The reversal of 664562423 is 324265466.

It is a cyclic number.

It is not a de Polignac number, because 664562423 - 2²⁸ = 396126967 is a prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664562443) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 276515 + ... + 278907.

It is an arithmetic number, because the mean of its divisors is an integer number (48095460).

Almost surely, 2^664562423 is an apocalyptic number.

664562423 is a deficient number, since it is larger than the sum of its proper divisors (104964937).

664562423 is a wasteful number, since it uses less digits than its factorization.

664562423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906.

The product of its digits is 207360, while the sum is 38.

The square root of 664562423 is about 25779.1082661911. The cubic root of 664562423 is about 872.6603829380.

The spelling of 664562423 in words is "six hundred sixty-four million, five hundred sixty-two thousand, four hundred twenty-three".