664246982 has 16 divisors (see below), whose sum is σ = 1175442432. Its totient is φ = 275493960.

The previous prime is 664246963. The next prime is 664246987. The reversal of 664246982 is 289642466.

It is a happy number.

It is a super-2 number, since 2×664246982² = 882448106192216648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664246987) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 764828 + ... + 765695.

It is an arithmetic number, because the mean of its divisors is an integer number (73465152).

Almost surely, 2^664246982 is an apocalyptic number.

664246982 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

664246982 is a deficient number, since it is larger than the sum of its proper divisors (511195450).

664246982 is a wasteful number, since it uses less digits than its factorization.

664246982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530563.

The product of its digits is 995328, while the sum is 47.

The square root of 664246982 is about 25772.9893881172. The cubic root of 664246982 is about 872.5222888480.

The spelling of 664246982 in words is "six hundred sixty-four million, two hundred forty-six thousand, nine hundred eighty-two".