15666066116115 has 32 divisors (see below), whose sum is σ = 26455690778880. Its totient is φ = 7894264841856.

The previous prime is 15666066116087. The next prime is 15666066116143. The reversal of 15666066116115 is 51161166066651.

It is an interprime number because it is at equal distance from previous prime (15666066116087) and next prime (15666066116143).

It is not a de Polignac number, because 15666066116115 - 2¹⁴ = 15666066099731 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 73578217 + ... + 73790826.

It is an arithmetic number, because the mean of its divisors is an integer number (826740336840).

Almost surely, 2^{15666066116115} is an apocalyptic number.

15666066116115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15666066116115 is a deficient number, since it is larger than the sum of its proper divisors (10789624662765).

15666066116115 is a wasteful number, since it uses less digits than its factorization.

15666066116115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147369443.

The product of its (nonzero) digits is 1166400, while the sum is 51.

The spelling of 15666066116115 in words is "fifteen trillion, six hundred sixty-six billion, sixty-six million, one hundred sixteen thousand, one hundred fifteen".