66909166 has 8 divisors (see below), whose sum is σ = 100493640. Its totient is φ = 33411288.

The previous prime is 66909163. The next prime is 66909169. The reversal of 66909166 is 66190966.

It is an interprime number because it is at equal distance from previous prime (66909163) and next prime (66909169).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66909163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19681 + ... + 22828.

It is an arithmetic number, because the mean of its divisors is an integer number (12561705).

Almost surely, 2^66909166 is an apocalyptic number.

66909166 is a deficient number, since it is larger than the sum of its proper divisors (33584474).

66909166 is a wasteful number, since it uses less digits than its factorization.

66909166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43298.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 66909166 is about 8179.8023203498. The cubic root of 66909166 is about 405.9711814338.

The spelling of 66909166 in words is "sixty-six million, nine hundred nine thousand, one hundred sixty-six".