66188295180 has 192 divisors, whose sum is σ = 235452564480. Its totient is φ = 15121271808.

The previous prime is 66188295163. The next prime is 66188295181. The reversal of 66188295180 is 8159288166.

It is a happy number.

66188295180 is a `hidden beast` number, since 6 + 618 + 8 + 2 + 9 + 5 + 18 + 0 = 666.

It is a super-2 number, since 2×66188295180² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (66188295181) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12157539 + ... + 12162981.

It is an arithmetic number, because the mean of its divisors is an integer number (1226315440).

Almost surely, 2^66188295180 is an apocalyptic number.

66188295180 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66188295180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117726282240).

66188295180 is an abundant number, since it is smaller than the sum of its proper divisors (169264269300).

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

66188295180 is a wasteful number, since it uses less digits than its factorization.

66188295180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8685 (or 8677 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 54.

The spelling of 66188295180 in words is "sixty-six billion, one hundred eighty-eight million, two hundred ninety-five thousand, one hundred eighty".