664494303 has 16 divisors (see below), whose sum is σ = 975926016. Its totient is φ = 398811840.

The previous prime is 664494301. The next prime is 664494307. The reversal of 664494303 is 303494466.

It is a happy number.

It is not a de Polignac number, because 664494303 - 2¹ = 664494301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664494301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94350 + ... + 101147.

It is an arithmetic number, because the mean of its divisors is an integer number (60995376).

Almost surely, 2^664494303 is an apocalyptic number.

664494303 is a deficient number, since it is larger than the sum of its proper divisors (311431713).

664494303 is a wasteful number, since it uses less digits than its factorization.

664494303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195614.

The product of its (nonzero) digits is 186624, while the sum is 39.

The square root of 664494303 is about 25777.7870074217. The cubic root of 664494303 is about 872.6305649934.

The spelling of 664494303 in words is "six hundred sixty-four million, four hundred ninety-four thousand, three hundred three".