3125856116666 has 16 divisors (see below), whose sum is σ = 4854258892800. Its totient is φ = 1507854097008.

The previous prime is 3125856116659. The next prime is 3125856116683. The reversal of 3125856116666 is 6666116585213.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20994650 + ... + 21143013.

It is an arithmetic number, because the mean of its divisors is an integer number (303391180800).

Almost surely, 2^{3125856116666} is an apocalyptic number.

3125856116666 is a deficient number, since it is larger than the sum of its proper divisors (1728402776134).

3125856116666 is a wasteful number, since it uses less digits than its factorization.

3125856116666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42138973.

The product of its digits is 9331200, while the sum is 56.

The spelling of 3125856116666 in words is "three trillion, one hundred twenty-five billion, eight hundred fifty-six million, one hundred sixteen thousand, six hundred sixty-six".