666803492 has 24 divisors (see below), whose sum is σ = 1206119544. Its totient is φ = 322313472.

The previous prime is 666803483. The next prime is 666803507. The reversal of 666803492 is 294308666.

It can be written as a sum of positive squares in 4 ways, for example, as 46594276 + 620209216 = 6826^2 + 24904^2 .

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 7 ways as a sum of consecutive naturals, for example, 8888 + ... + 37584.

It is an arithmetic number, because the mean of its divisors is an integer number (50254981).

Almost surely, 2^666803492 is an apocalyptic number.

It is an amenable number.

666803492 is a deficient number, since it is larger than the sum of its proper divisors (539316052).

666803492 is a wasteful number, since it uses less digits than its factorization.

666803492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28895 (or 28893 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 44.

The square root of 666803492 is about 25822.5384499665. The cubic root of 666803492 is about 873.6402246173.

The spelling of 666803492 in words is "six hundred sixty-six million, eight hundred three thousand, four hundred ninety-two".