66868994 has 8 divisors (see below), whose sum is σ = 100506000. Its totient is φ = 33366996.

The previous prime is 66868943. The next prime is 66869021. The reversal of 66868994 is 49986866.

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

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, 32504 + ... + 34499.

It is an arithmetic number, because the mean of its divisors is an integer number (12563250).

Almost surely, 2^66868994 is an apocalyptic number.

66868994 is a deficient number, since it is larger than the sum of its proper divisors (33637006).

66868994 is a wasteful number, since it uses less digits than its factorization.

66868994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67504.

The product of its digits is 4478976, while the sum is 56.

The square root of 66868994 is about 8177.3463910978. The cubic root of 66868994 is about 405.8899173348.

The spelling of 66868994 in words is "sixty-six million, eight hundred sixty-eight thousand, nine hundred ninety-four".