66916966 has 8 divisors (see below), whose sum is σ = 100432800. Its totient is φ = 33439368.

The previous prime is 66916951. The next prime is 66916973. The reversal of 66916966 is 66961966.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4686 + ... + 12481.

It is an arithmetic number, because the mean of its divisors is an integer number (12554100).

Almost surely, 2^66916966 is an apocalyptic number.

66916966 is a deficient number, since it is larger than the sum of its proper divisors (33515834).

66916966 is a wasteful number, since it uses less digits than its factorization.

66916966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19118.

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

The square root of 66916966 is about 8180.2790905934. The cubic root of 66916966 is about 405.9869563137.

The spelling of 66916966 in words is "sixty-six million, nine hundred sixteen thousand, nine hundred sixty-six".