666498474 has 24 divisors (see below), whose sum is σ = 1493877060. Its totient is φ = 214505088.

The previous prime is 666498457. The next prime is 666498487. The reversal of 666498474 is 474894666.

It can be written as a sum of positive squares in 2 ways, for example, as 657153225 + 9345249 = 25635^2 + 3057^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 666498474.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 637887 + ... + 638930.

Almost surely, 2^666498474 is an apocalyptic number.

666498474 is an abundant number, since it is smaller than the sum of its proper divisors (827378586).

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

666498474 is a wasteful number, since it uses less digits than its factorization.

666498474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276854 (or 1276851 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The square root of 666498474 is about 25816.6317322768. The cubic root of 666498474 is about 873.5069936433.

The spelling of 666498474 in words is "six hundred sixty-six million, four hundred ninety-eight thousand, four hundred seventy-four".