664422249 has 8 divisors (see below), whose sum is σ = 886021632. Its totient is φ = 442885520.

The previous prime is 664422223. The next prime is 664422263. The reversal of 664422249 is 942224466.

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 664422249 - 2²³ = 656033641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664422749) 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, 22072 + ... + 42614.

It is an arithmetic number, because the mean of its divisors is an integer number (110752704).

Almost surely, 2^664422249 is an apocalyptic number.

It is an amenable number.

664422249 is a deficient number, since it is larger than the sum of its proper divisors (221599383).

664422249 is a wasteful number, since it uses less digits than its factorization.

664422249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31327.

The product of its digits is 165888, while the sum is 39.

The square root of 664422249 is about 25776.3893708952. The cubic root of 664422249 is about 872.5990228140.

The spelling of 664422249 in words is "six hundred sixty-four million, four hundred twenty-two thousand, two hundred forty-nine".