66568794 has 8 divisors (see below), whose sum is σ = 133137600. Its totient is φ = 22189596.

The previous prime is 66568793. The next prime is 66568813. The reversal of 66568794 is 49786566.

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

66568794 is an admirable number.

It is a super-2 number, since 2×66568794² = 8862808669228872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66568793) 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, 5547394 + ... + 5547405.

It is an arithmetic number, because the mean of its divisors is an integer number (16642200).

Almost surely, 2^66568794 is an apocalyptic number.

66568794 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66568794 is a wasteful number, since it uses less digits than its factorization.

66568794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11094804.

The product of its digits is 2177280, while the sum is 51.

The square root of 66568794 is about 8158.9701556017. The cubic root of 66568794 is about 405.2816087465.

The spelling of 66568794 in words is "sixty-six million, five hundred sixty-eight thousand, seven hundred ninety-four".