66116180 has 72 divisors (see below), whose sum is σ = 155441664. Its totient is φ = 23587200.

The previous prime is 66116119. The next prime is 66116227. The reversal of 66116180 is 8161166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104465 + ... + 105095.

It is an arithmetic number, because the mean of its divisors is an integer number (2158912).

Almost surely, 2^66116180 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 66116180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77720832).

66116180 is an abundant number, since it is smaller than the sum of its proper divisors (89325484).

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

66116180 is a wasteful number, since it uses less digits than its factorization.

66116180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697 (or 682 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 66116180 is about 8131.1856454025. The cubic root of 66116180 is about 404.3609899615.

The spelling of 66116180 in words is "sixty-six million, one hundred sixteen thousand, one hundred eighty".