66345305734181 has 16 divisors (see below), whose sum is σ = 67773511200000. Its totient is φ = 64927300251456.

The previous prime is 66345305734109. The next prime is 66345305734187. The reversal of 66345305734181 is 18143750354366.

66345305734181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 66345305734181 - 2⁴² = 61947259223077 is a prime.

It is a super-2 number, since 2×66345305734181² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66345305734187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101669300 + ... + 102319778.

It is an arithmetic number, because the mean of its divisors is an integer number (4235844450000).

Almost surely, 2^{66345305734181} is an apocalyptic number.

It is an amenable number.

66345305734181 is a deficient number, since it is larger than the sum of its proper divisors (1428205465819).

66345305734181 is a wasteful number, since it uses less digits than its factorization.

66345305734181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658316.

The product of its (nonzero) digits is 21772800, while the sum is 56.

The spelling of 66345305734181 in words is "sixty-six trillion, three hundred forty-five billion, three hundred five million, seven hundred thirty-four thousand, one hundred eighty-one".