66291166 has 8 divisors (see below), whose sum is σ = 99492624. Its totient is φ = 33126960.

The previous prime is 66291139. The next prime is 66291179. The reversal of 66291166 is 66119266.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 4330 + ... + 12301.

It is an arithmetic number, because the mean of its divisors is an integer number (12436578).

Almost surely, 2^66291166 is an apocalyptic number.

66291166 is a deficient number, since it is larger than the sum of its proper divisors (33201458).

66291166 is a wasteful number, since it uses less digits than its factorization.

66291166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18626.

The product of its digits is 23328, while the sum is 37.

The square root of 66291166 is about 8141.9387126163. The cubic root of 66291166 is about 404.7174089223.

The spelling of 66291166 in words is "sixty-six million, two hundred ninety-one thousand, one hundred sixty-six".