66115111151 has 8 divisors (see below), whose sum is σ = 70601232000. Its totient is φ = 61776076320.

The previous prime is 66115111079. The next prime is 66115111157. The reversal of 66115111151 is 15111151166.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66115111151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66115111157) 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 7 ways as a sum of consecutive naturals, for example, 36770576 + ... + 36772373.

It is an arithmetic number, because the mean of its divisors is an integer number (8825154000).

Almost surely, 2^66115111151 is an apocalyptic number.

66115111151 is a deficient number, since it is larger than the sum of its proper divisors (4486120849).

66115111151 is a wasteful number, since it uses less digits than its factorization.

66115111151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73543009.

The product of its digits is 900, while the sum is 29.

The spelling of 66115111151 in words is "sixty-six billion, one hundred fifteen million, one hundred eleven thousand, one hundred fifty-one".