166660650515 has 16 divisors (see below), whose sum is σ = 215653324320. Its totient is φ = 123230465280.

The previous prime is 166660650493. The next prime is 166660650517. The reversal of 166660650515 is 515056066661.

It is not a de Polignac number, because 166660650515 - 2⁸ = 166660650259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166660650515.

It is not an unprimeable number, because it can be changed into a prime (166660650517) 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, 21390284 + ... + 21398073.

It is an arithmetic number, because the mean of its divisors is an integer number (13478332770).

Almost surely, 2^166660650515 is an apocalyptic number.

166660650515 is a deficient number, since it is larger than the sum of its proper divisors (48992673805).

166660650515 is a wasteful number, since it uses less digits than its factorization.

166660650515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42788422.

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 166660650515 in words is "one hundred sixty-six billion, six hundred sixty million, six hundred fifty thousand, five hundred fifteen".