66180022272 has 680 divisors, whose sum is σ = 245125838496. Its totient is φ = 17326669824.

The previous prime is 66180022261. The next prime is 66180022277. The reversal of 66180022272 is 27222008166.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (66180022277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 483065788 + ... + 483065924.

Almost surely, 2^66180022272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66180022272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122562919248).

66180022272 is an abundant number, since it is smaller than the sum of its proper divisors (178945816224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66180022272 is an equidigital number, since it uses as much as digits as its factorization.

66180022272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 66180022272 in words is "sixty-six billion, one hundred eighty million, twenty-two thousand, two hundred seventy-two".