664222465 has 8 divisors (see below), whose sum is σ = 797231808. Its totient is φ = 531268080.

The previous prime is 664222459. The next prime is 664222469. The reversal of 664222465 is 564222466.

664222465 is digitally balanced in base 2 and base 6, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 664222465 - 2³ = 664222457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664222469) 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, 20710 + ... + 41920.

It is an arithmetic number, because the mean of its divisors is an integer number (99653976).

Almost surely, 2^664222465 is an apocalyptic number.

It is an amenable number.

664222465 is a deficient number, since it is larger than the sum of its proper divisors (133009343).

664222465 is a wasteful number, since it uses less digits than its factorization.

664222465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27479.

The product of its digits is 138240, while the sum is 37.

The square root of 664222465 is about 25772.5137501176. The cubic root of 664222465 is about 872.5115539393.

Subtracting from 664222465 its reverse (564222466), we obtain a palindrome (99999999).

The spelling of 664222465 in words is "six hundred sixty-four million, two hundred twenty-two thousand, four hundred sixty-five".