66188295018 has 32 divisors (see below), whose sum is σ = 148513123200. Its totient is φ = 21848561568.

The previous prime is 66188295013. The next prime is 66188295071. The reversal of 66188295018 is 81059288166.

It is a happy number.

66188295018 is a `hidden beast` number, since 6 + 618 + 8 + 2 + 9 + 5 + 0 + 18 = 666.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66188295013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5944483 + ... + 5955606.

It is an arithmetic number, because the mean of its divisors is an integer number (4641035100).

Almost surely, 2^66188295018 is an apocalyptic number.

66188295018 is an abundant number, since it is smaller than the sum of its proper divisors (82324828182).

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

66188295018 is a wasteful number, since it uses less digits than its factorization.

66188295018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11900203 (or 11900197 counting only the distinct ones).

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

It can be divided in two parts, 661882 and 95018, that added together give a square (756900 = 870²).

The spelling of 66188295018 in words is "sixty-six billion, one hundred eighty-eight million, two hundred ninety-five thousand, eighteen".