664257336 has 64 divisors (see below), whose sum is σ = 1730150400. Its totient is φ = 212284800.

The previous prime is 664257313. The next prime is 664257343. The reversal of 664257336 is 633752466.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77001 + ... + 85191.

It is an arithmetic number, because the mean of its divisors is an integer number (27033600).

Almost surely, 2^664257336 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664257336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (865075200).

664257336 is an abundant number, since it is smaller than the sum of its proper divisors (1065893064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664257336 is a wasteful number, since it uses less digits than its factorization.

664257336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8340 (or 8336 counting only the distinct ones).

The product of its digits is 544320, while the sum is 42.

The square root of 664257336 is about 25773.1902565437. The cubic root of 664257336 is about 872.5268223268.

The spelling of 664257336 in words is "six hundred sixty-four million, two hundred fifty-seven thousand, three hundred thirty-six".