66646795 has 4 divisors (see below), whose sum is σ = 79976160. Its totient is φ = 53317432.

The previous prime is 66646787. The next prime is 66646819. The reversal of 66646795 is 59764666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66646795 - 2³ = 66646787 is a prime.

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, 6664675 + ... + 6664684.

It is an arithmetic number, because the mean of its divisors is an integer number (19994040).

Almost surely, 2^66646795 is an apocalyptic number.

66646795 is a deficient number, since it is larger than the sum of its proper divisors (13329365).

66646795 is a wasteful number, since it uses less digits than its factorization.

66646795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13329364.

The product of its digits is 1632960, while the sum is 49.

The square root of 66646795 is about 8163.7488324911. The cubic root of 66646795 is about 405.4398412044.

The spelling of 66646795 in words is "sixty-six million, six hundred forty-six thousand, seven hundred ninety-five".