66996166 has 8 divisors (see below), whose sum is σ = 105783480. Its totient is φ = 31735008.

The previous prime is 66996161. The next prime is 66996169. The reversal of 66996166 is 66169966.

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 (66996161) by changing a digit.

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, 881491 + ... + 881566.

It is an arithmetic number, because the mean of its divisors is an integer number (13222935).

Almost surely, 2^66996166 is an apocalyptic number.

66996166 is a deficient number, since it is larger than the sum of its proper divisors (38787314).

66996166 is a wasteful number, since it uses less digits than its factorization.

66996166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1763078.

The product of its digits is 629856, while the sum is 49.

The square root of 66996166 is about 8185.1185696971. The cubic root of 66996166 is about 406.1470626453.

The spelling of 66996166 in words is "sixty-six million, nine hundred ninety-six thousand, one hundred sixty-six".