6665166694 has 8 divisors (see below), whose sum is σ = 9998100000. Its totient is φ = 3332466696.

The previous prime is 6665166671. The next prime is 6665166707. The reversal of 6665166694 is 4966615666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 66672 + ... + 133324.

It is an arithmetic number, because the mean of its divisors is an integer number (1249762500).

Almost surely, 2^6665166694 is an apocalyptic number.

6665166694 is a deficient number, since it is larger than the sum of its proper divisors (3332933306).

6665166694 is a wasteful number, since it uses less digits than its factorization.

6665166694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116654.

The product of its digits is 8398080, while the sum is 55.

The square root of 6665166694 is about 81640.4721568904. The cubic root of 6665166694 is about 1881.9308943423.

The spelling of 6665166694 in words is "six billion, six hundred sixty-five million, one hundred sixty-six thousand, six hundred ninety-four".