664241264 has 40 divisors (see below), whose sum is σ = 1302238080. Its totient is φ = 328203200.

The previous prime is 664241213. The next prime is 664241267. The reversal of 664241264 is 462142466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664241267) 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, 651347 + ... + 652365.

It is an arithmetic number, because the mean of its divisors is an integer number (32555952).

Almost surely, 2^664241264 is an apocalyptic number.

It is an amenable number.

664241264 is a deficient number, since it is larger than the sum of its proper divisors (637996816).

664241264 is a wasteful number, since it uses less digits than its factorization.

664241264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469 (or 1463 counting only the distinct ones).

The product of its digits is 55296, while the sum is 35.

The square root of 664241264 is about 25772.8784577897. The cubic root of 664241264 is about 872.5197852126.

The spelling of 664241264 in words is "six hundred sixty-four million, two hundred forty-one thousand, two hundred sixty-four".