664266294 has 48 divisors (see below), whose sum is σ = 1461867264. Its totient is φ = 217968000.

The previous prime is 664266293. The next prime is 664266299. The reversal of 664266294 is 492662466.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664266293) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 346282 + ... + 348194.

It is an arithmetic number, because the mean of its divisors is an integer number (30455568).

Almost surely, 2^664266294 is an apocalyptic number.

664266294 is an abundant number, since it is smaller than the sum of its proper divisors (797600970).

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

664266294 is a wasteful number, since it uses less digits than its factorization.

664266294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2213 (or 2210 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The square root of 664266294 is about 25773.3640411957. The cubic root of 664266294 is about 872.5307445317.

The spelling of 664266294 in words is "six hundred sixty-four million, two hundred sixty-six thousand, two hundred ninety-four".