1666835166664 has 32 divisors (see below), whose sum is σ = 3229057981440. Its totient is φ = 805801795200.

The previous prime is 1666835166613. The next prime is 1666835166709. The reversal of 1666835166664 is 4666615386661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1666835166596 and 1666835166605.

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, 2773197 + ... + 3320284.

It is an arithmetic number, because the mean of its divisors is an integer number (100908061920).

Almost surely, 2^{1666835166664} is an apocalyptic number.

It is an amenable number.

1666835166664 is a deficient number, since it is larger than the sum of its proper divisors (1562222814776).

1666835166664 is a wasteful number, since it uses less digits than its factorization.

1666835166664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6094621 (or 6094617 counting only the distinct ones).

The product of its digits is 134369280, while the sum is 64.

The spelling of 1666835166664 in words is "one trillion, six hundred sixty-six billion, eight hundred thirty-five million, one hundred sixty-six thousand, six hundred sixty-four".