66610601253272 has 16 divisors (see below), whose sum is σ = 127552215166560. Its totient is φ = 32596677208864.

The previous prime is 66610601253271. The next prime is 66610601253479. The reversal of 66610601253272 is 27235210601666.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66610601253271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88577926823 + ... + 88577927574.

It is an arithmetic number, because the mean of its divisors is an integer number (7972013447910).

Almost surely, 2^{66610601253272} is an apocalyptic number.

It is an amenable number.

66610601253272 is a deficient number, since it is larger than the sum of its proper divisors (60941613913288).

66610601253272 is a wasteful number, since it uses less digits than its factorization.

66610601253272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177155854450 (or 177155854446 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 66610601253272 in words is "sixty-six trillion, six hundred ten billion, six hundred one million, two hundred fifty-three thousand, two hundred seventy-two".