115115066661 has 48 divisors (see below), whose sum is σ = 186831427200. Its totient is φ = 61745763456.

The previous prime is 115115066659. The next prime is 115115066663. The reversal of 115115066661 is 166660511511.

It is an interprime number because it is at equal distance from previous prime (115115066659) and next prime (115115066663).

It is not a de Polignac number, because 115115066661 - 2¹ = 115115066659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115115066663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 756675 + ... + 895983.

It is an arithmetic number, because the mean of its divisors is an integer number (3892321400).

Almost surely, 2^115115066661 is an apocalyptic number.

It is an amenable number.

115115066661 is a deficient number, since it is larger than the sum of its proper divisors (71716360539).

115115066661 is a wasteful number, since it uses less digits than its factorization.

115115066661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139466 (or 139447 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 39.

The spelling of 115115066661 in words is "one hundred fifteen billion, one hundred fifteen million, sixty-six thousand, six hundred sixty-one".