166500505106515 has 4 divisors (see below), whose sum is σ = 199800606127824. Its totient is φ = 133200404085208.

The previous prime is 166500505106437. The next prime is 166500505106527. The reversal of 166500505106515 is 515601505005661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166500505106515 - 2⁹ = 166500505106003 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16650050510647 + ... + 16650050510656.

It is an arithmetic number, because the mean of its divisors is an integer number (49950151531956).

Almost surely, 2^{166500505106515} is an apocalyptic number.

166500505106515 is a deficient number, since it is larger than the sum of its proper divisors (33300101021309).

166500505106515 is an equidigital number, since it uses as much as digits as its factorization.

166500505106515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33300101021308.

The product of its (nonzero) digits is 675000, while the sum is 46.

The spelling of 166500505106515 in words is "one hundred sixty-six trillion, five hundred billion, five hundred five million, one hundred six thousand, five hundred fifteen".