6668166751 has 16 divisors (see below), whose sum is σ = 7388086464. Its totient is φ = 5991058944.

The previous prime is 6668166721. The next prime is 6668166763. The reversal of 6668166751 is 1576618666.

It is a happy number.

It is not a de Polignac number, because 6668166751 - 2⁵ = 6668166719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668166721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66675 + ... + 133348.

It is an arithmetic number, because the mean of its divisors is an integer number (461755404).

Almost surely, 2^6668166751 is an apocalyptic number.

6668166751 is a deficient number, since it is larger than the sum of its proper divisors (719919713).

6668166751 is a wasteful number, since it uses less digits than its factorization.

6668166751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200130.

The product of its digits is 2177280, while the sum is 52.

The square root of 6668166751 is about 81658.8436790529. The cubic root of 6668166751 is about 1882.2132105159.

The spelling of 6668166751 in words is "six billion, six hundred sixty-eight million, one hundred sixty-six thousand, seven hundred fifty-one".