666446474 has 8 divisors (see below), whose sum is σ = 1006037508. Its totient is φ = 331100640.

The previous prime is 666446447. The next prime is 666446483. The reversal of 666446474 is 474644666.

666446474 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 654592225 + 11854249 = 25585^2 + 3443^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060907 + ... + 1061534.

Almost surely, 2^666446474 is an apocalyptic number.

666446474 is a deficient number, since it is larger than the sum of its proper divisors (339591034).

666446474 is a wasteful number, since it uses less digits than its factorization.

666446474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122600.

The product of its digits is 2322432, while the sum is 47.

The square root of 666446474 is about 25815.6246099141. The cubic root of 666446474 is about 873.4842761395.

The spelling of 666446474 in words is "six hundred sixty-six million, four hundred forty-six thousand, four hundred seventy-four".