664499479 has 8 divisors (see below), whose sum is σ = 761093408. Its totient is φ = 568321920.

The previous prime is 664499471. The next prime is 664499497. The reversal of 664499479 is 974994466.

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 664499479 - 2³ = 664499471 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 (664499471) 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, 100662 + ... + 107059.

It is an arithmetic number, because the mean of its divisors is an integer number (95136676).

Almost surely, 2^664499479 is an apocalyptic number.

664499479 is a deficient number, since it is larger than the sum of its proper divisors (96593929).

664499479 is a wasteful number, since it uses less digits than its factorization.

664499479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208185.

The product of its digits is 11757312, while the sum is 58.

The square root of 664499479 is about 25777.8874037420. The cubic root of 664499479 is about 872.6328307384.

The spelling of 664499479 in words is "six hundred sixty-four million, four hundred ninety-nine thousand, four hundred seventy-nine".