66646796 has 12 divisors (see below), whose sum is σ = 116753280. Its totient is φ = 33288720.

The previous prime is 66646787. The next prime is 66646819. The reversal of 66646796 is 69764666.

It is a happy number.

It is a zygodrome in base 2.

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, 4076 + ... + 12243.

It is an arithmetic number, because the mean of its divisors is an integer number (9729440).

Almost surely, 2^66646796 is an apocalyptic number.

It is an amenable number.

66646796 is a deficient number, since it is larger than the sum of its proper divisors (50106484).

66646796 is a wasteful number, since it uses less digits than its factorization.

66646796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17344 (or 17342 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 50.

The square root of 66646796 is about 8163.7488937375. The cubic root of 66646796 is about 405.4398432322.

The spelling of 66646796 in words is "sixty-six million, six hundred forty-six thousand, seven hundred ninety-six".