66172755302 has 16 divisors (see below), whose sum is σ = 101950409760. Its totient is φ = 32189436288.

The previous prime is 66172755269. The next prime is 66172755371. The reversal of 66172755302 is 20355727166.

66172755302 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66172755302² (a number of 22 digits) contains 22 as substring.

It is a congruent 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, 1060199 + ... + 1120877.

It is an arithmetic number, because the mean of its divisors is an integer number (6371900610).

Almost surely, 2^66172755302 is an apocalyptic number.

66172755302 is a deficient number, since it is larger than the sum of its proper divisors (35777654458).

66172755302 is a wasteful number, since it uses less digits than its factorization.

66172755302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75455.

The product of its (nonzero) digits is 529200, while the sum is 44.

The spelling of 66172755302 in words is "sixty-six billion, one hundred seventy-two million, seven hundred fifty-five thousand, three hundred two".