66166708 has 12 divisors (see below), whose sum is σ = 116530372. Its totient is φ = 32872320.

The previous prime is 66166691. The next prime is 66166729. The reversal of 66166708 is 80766166.

It can be written as a sum of positive squares in 2 ways, for example, as 39664804 + 26501904 = 6298^2 + 5148^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 52053 + ... + 53308.

Almost surely, 2^66166708 is an apocalyptic number.

It is an amenable number.

66166708 is a deficient number, since it is larger than the sum of its proper divisors (50363664).

66166708 is a wasteful number, since it uses less digits than its factorization.

66166708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105522 (or 105520 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 66166708 is about 8134.2921019595. The cubic root of 66166708 is about 404.4639720632.

The spelling of 66166708 in words is "sixty-six million, one hundred sixty-six thousand, seven hundred eight".