66749180 has 24 divisors (see below), whose sum is σ = 140955360. Its totient is φ = 26550720.

The previous prime is 66749173. The next prime is 66749203. The reversal of 66749180 is 8194766.

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, 5600 + ... + 12839.

It is an arithmetic number, because the mean of its divisors is an integer number (5873140).

Almost surely, 2^66749180 is an apocalyptic number.

It is an amenable number.

66749180 is an abundant number, since it is smaller than the sum of its proper divisors (74206180).

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

66749180 is a wasteful number, since it uses less digits than its factorization.

66749180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18629 (or 18627 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 66749180 is about 8170.0171358449. The cubic root of 66749180 is about 405.6473516552.

The spelling of 66749180 in words is "sixty-six million, seven hundred forty-nine thousand, one hundred eighty".