66766372145 has 16 divisors (see below), whose sum is σ = 87422058432. Its totient is φ = 48546912960.

The previous prime is 66766372133. The next prime is 66766372177. The reversal of 66766372145 is 54127366766.

It is not a de Polignac number, because 66766372145 - 2²⁸ = 66497936689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132074 + ... + 388556.

It is an arithmetic number, because the mean of its divisors is an integer number (5463878652).

Almost surely, 2^66766372145 is an apocalyptic number.

It is an amenable number.

66766372145 is a deficient number, since it is larger than the sum of its proper divisors (20655686287).

66766372145 is a wasteful number, since it uses less digits than its factorization.

66766372145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261232.

The product of its digits is 7620480, while the sum is 53.

The spelling of 66766372145 in words is "sixty-six billion, seven hundred sixty-six million, three hundred seventy-two thousand, one hundred forty-five".