166115505116503 has 8 divisors (see below), whose sum is σ = 168203666974608. Its totient is φ = 164037263267904.

The previous prime is 166115505116501. The next prime is 166115505116531. The reversal of 166115505116503 is 305611505511661.

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

It is a cyclic number.

It is not a de Polignac number, because 166115505116503 - 2¹ = 166115505116501 is a prime.

It is a super-2 number, since 2×166115505116503² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166115505116501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2479968676 + ... + 2480035657.

It is an arithmetic number, because the mean of its divisors is an integer number (21025458371826).

Almost surely, 2^{166115505116503} is an apocalyptic number.

166115505116503 is a deficient number, since it is larger than the sum of its proper divisors (2088161858105).

166115505116503 is a wasteful number, since it uses less digits than its factorization.

166115505116503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4960004753.

The product of its (nonzero) digits is 405000, while the sum is 46.

The spelling of 166115505116503 in words is "one hundred sixty-six trillion, one hundred fifteen billion, five hundred five million, one hundred sixteen thousand, five hundred three".