666574587 has 108 divisors (see below), whose sum is σ = 1219626720. Its totient is φ = 349562304.

The previous prime is 666574553. The next prime is 666574589. The reversal of 666574587 is 785475666.

It is not a de Polignac number, because 666574587 - 2¹¹ = 666572539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666574589) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 8437614 + ... + 8437692.

It is an arithmetic number, because the mean of its divisors is an integer number (11292840).

Almost surely, 2^666574587 is an apocalyptic number.

666574587 is a deficient number, since it is larger than the sum of its proper divisors (553052133).

666574587 is a wasteful number, since it uses less digits than its factorization.

666574587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 161 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 54.

The square root of 666574587 is about 25818.1057980635. The cubic root of 666574587 is about 873.5402433855.

The spelling of 666574587 in words is "six hundred sixty-six million, five hundred seventy-four thousand, five hundred eighty-seven".