66797866 has 8 divisors (see below), whose sum is σ = 100646784. Its totient is φ = 33248940.

The previous prime is 66797833. The next prime is 66797891. The reversal of 66797866 is 66879766.

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, 74440 + ... + 75331.

It is an arithmetic number, because the mean of its divisors is an integer number (12580848).

Almost surely, 2^66797866 is an apocalyptic number.

66797866 is a deficient number, since it is larger than the sum of its proper divisors (33848918).

66797866 is a wasteful number, since it uses less digits than its factorization.

66797866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149996.

The product of its digits is 4572288, while the sum is 55.

The square root of 66797866 is about 8172.9961458452. The cubic root of 66797866 is about 405.7459523535.

The spelling of 66797866 in words is "sixty-six million, seven hundred ninety-seven thousand, eight hundred sixty-six".