664486210 has 16 divisors (see below), whose sum is σ = 1196580600. Its totient is φ = 265682176.

The previous prime is 664486117. The next prime is 664486241. The reversal of 664486210 is 12684466.

It can be written as a sum of positive squares in 4 ways, for example, as 598340521 + 66145689 = 24461^2 + 8133^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 664486210.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13356 + ... + 38824.

Almost surely, 2^664486210 is an apocalyptic number.

664486210 is a deficient number, since it is larger than the sum of its proper divisors (532094390).

664486210 is a wasteful number, since it uses less digits than its factorization.

664486210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28085.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 664486210 is about 25777.6300307069. The cubic root of 664486210 is about 872.6270223355.

The spelling of 664486210 in words is "six hundred sixty-four million, four hundred eighty-six thousand, two hundred ten".