66868792 has 8 divisors (see below), whose sum is σ = 125379000. Its totient is φ = 33434392.

The previous prime is 66868777. The next prime is 66868801. The reversal of 66868792 is 29786866.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4179292 + ... + 4179307.

It is an arithmetic number, because the mean of its divisors is an integer number (15672375).

Almost surely, 2^66868792 is an apocalyptic number.

It is an amenable number.

66868792 is a deficient number, since it is larger than the sum of its proper divisors (58510208).

66868792 is a wasteful number, since it uses less digits than its factorization.

66868792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8358605 (or 8358601 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 52.

The square root of 66868792 is about 8177.3340398934. The cubic root of 66868792 is about 405.8895086259.

The spelling of 66868792 in words is "sixty-six million, eight hundred sixty-eight thousand, seven hundred ninety-two".