6665166751 has 8 divisors (see below), whose sum is σ = 6719328000. Its totient is φ = 6611206560.

The previous prime is 6665166737. The next prime is 6665166793. The reversal of 6665166751 is 1576615666.

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

It is a cyclic number.

It is not a de Polignac number, because 6665166751 - 2⁵ = 6665166719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6665166695 and 6665166704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6665166451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16665 + ... + 116653.

It is an arithmetic number, because the mean of its divisors is an integer number (839916000).

Almost surely, 2^6665166751 is an apocalyptic number.

6665166751 is a deficient number, since it is larger than the sum of its proper divisors (54161249).

6665166751 is a wasteful number, since it uses less digits than its factorization.

6665166751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100529.

The product of its digits is 1360800, while the sum is 49.

The square root of 6665166751 is about 81640.4725059820. The cubic root of 6665166751 is about 1881.9308997070.

The spelling of 6665166751 in words is "six billion, six hundred sixty-five million, one hundred sixty-six thousand, seven hundred fifty-one".