66008194 has 12 divisors (see below), whose sum is σ = 115177734. Its totient is φ = 28289184.

The previous prime is 66008191. The next prime is 66008227. The reversal of 66008194 is 49180066.

It can be written as a sum of positive squares in only one way, i.e., 54952569 + 11055625 = 7413^2 + 3325^2 .

It is not an unprimeable number, because it can be changed into a prime (66008191) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 336679 + ... + 336874.

Almost surely, 2^66008194 is an apocalyptic number.

66008194 is a deficient number, since it is larger than the sum of its proper divisors (49169540).

66008194 is a wasteful number, since it uses less digits than its factorization.

66008194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673569 (or 673562 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 66008194 is about 8124.5426948229. The cubic root of 66008194 is about 404.1407255725.

The spelling of 66008194 in words is "sixty-six million, eight thousand, one hundred ninety-four".