664623301 has 4 divisors (see below), whose sum is σ = 664708032. Its totient is φ = 664538572.

The previous prime is 664623277. The next prime is 664623319. The reversal of 664623301 is 103326466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 103326466 = 2 ⋅51663233.

It is a cyclic number.

It is not a de Polignac number, because 664623301 - 2¹⁹ = 664099013 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 (664623361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29245 + ... + 46738.

It is an arithmetic number, because the mean of its divisors is an integer number (166177008).

Almost surely, 2^664623301 is an apocalyptic number.

It is an amenable number.

664623301 is a deficient number, since it is larger than the sum of its proper divisors (84731).

664623301 is an equidigital number, since it uses as much as digits as its factorization.

664623301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84730.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 664623301 is about 25780.2890014833. The cubic root of 664623301 is about 872.6870291414.

Adding to 664623301 its reverse (103326466), we get a palindrome (767949767).

The spelling of 664623301 in words is "six hundred sixty-four million, six hundred twenty-three thousand, three hundred one".