66168128795 has 8 divisors (see below), whose sum is σ = 82854004896. Its totient is φ = 50633002816.

The previous prime is 66168128783. The next prime is 66168128801. The reversal of 66168128795 is 59782186166.

It is a happy number.

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 66168128795 - 2¹⁴ = 66168112411 is a prime.

It is a Duffinian 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, 287687402 + ... + 287687631.

It is an arithmetic number, because the mean of its divisors is an integer number (10356750612).

Almost surely, 2^66168128795 is an apocalyptic number.

66168128795 is a deficient number, since it is larger than the sum of its proper divisors (16685876101).

66168128795 is a wasteful number, since it uses less digits than its factorization.

66168128795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575375061.

The product of its digits is 8709120, while the sum is 59.

The spelling of 66168128795 in words is "sixty-six billion, one hundred sixty-eight million, one hundred twenty-eight thousand, seven hundred ninety-five".