66631874 has 32 divisors (see below), whose sum is σ = 111404160. Its totient is φ = 29728512.

The previous prime is 66631849. The next prime is 66631889. The reversal of 66631874 is 47813666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108392 + ... + 109004.

It is an arithmetic number, because the mean of its divisors is an integer number (3481380).

Almost surely, 2^66631874 is an apocalyptic number.

66631874 is a deficient number, since it is larger than the sum of its proper divisors (44772286).

66631874 is a wasteful number, since it uses less digits than its factorization.

66631874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794.

The product of its digits is 145152, while the sum is 41.

The square root of 66631874 is about 8162.8349242160. The cubic root of 66631874 is about 405.4095820880.

The spelling of 66631874 in words is "sixty-six million, six hundred thirty-one thousand, eight hundred seventy-four".