664652260 has 12 divisors (see below), whose sum is σ = 1395769788. Its totient is φ = 265860896.

The previous prime is 664652251. The next prime is 664652299. The reversal of 664652260 is 62256466.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 161188416 + 503463844 = 12696^2 + 22438^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16616287 + ... + 16616326.

It is an arithmetic number, because the mean of its divisors is an integer number (116314149).

Almost surely, 2^664652260 is an apocalyptic number.

It is an amenable number.

664652260 is an abundant number, since it is smaller than the sum of its proper divisors (731117528).

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

664652260 is a wasteful number, since it uses less digits than its factorization.

664652260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33232622 (or 33232620 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 664652260 is about 25780.8506453918. The cubic root of 664652260 is about 872.6997038784.

The spelling of 664652260 in words is "six hundred sixty-four million, six hundred fifty-two thousand, two hundred sixty".