674659566 has 48 divisors (see below), whose sum is σ = 1673758944. Its totient is φ = 192393792.

The previous prime is 674659561. The next prime is 674659571. The reversal of 674659566 is 665956476.

674659566 is a `hidden beast` number, since 6 + 7 + 46 + 595 + 6 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (674659561) and next prime (674659571).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674659561) 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 23 ways as a sum of consecutive naturals, for example, 65376 + ... + 74988.

It is an arithmetic number, because the mean of its divisors is an integer number (34869978).

Almost surely, 2^674659566 is an apocalyptic number.

674659566 is an abundant number, since it is smaller than the sum of its proper divisors (999099378).

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

674659566 is a wasteful number, since it uses less digits than its factorization.

674659566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10185 (or 10182 counting only the distinct ones).

The product of its digits is 8164800, while the sum is 54.

The square root of 674659566 is about 25974.2096318637. The cubic root of 674659566 is about 877.0578248046.

The spelling of 674659566 in words is "six hundred seventy-four million, six hundred fifty-nine thousand, five hundred sixty-six".