66172755303 has 8 divisors (see below), whose sum is σ = 98033711600. Its totient is φ = 44115170184.

The previous prime is 66172755269. The next prime is 66172755371. The reversal of 66172755303 is 30355727166.

66172755303 is a `hidden beast` number, since 6 + 617 + 27 + 5 + 5 + 3 + 0 + 3 = 666.

It is not a de Polignac number, because 66172755303 - 2⁶ = 66172755239 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 (66172755503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1225421368 + ... + 1225421421.

It is an arithmetic number, because the mean of its divisors is an integer number (12254213950).

Almost surely, 2^66172755303 is an apocalyptic number.

66172755303 is a deficient number, since it is larger than the sum of its proper divisors (31860956297).

66172755303 is a wasteful number, since it uses less digits than its factorization.

66172755303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2450842798 (or 2450842792 counting only the distinct ones).

The product of its (nonzero) digits is 793800, while the sum is 45.

The spelling of 66172755303 in words is "sixty-six billion, one hundred seventy-two million, seven hundred fifty-five thousand, three hundred three".