166106561116155 has 64 divisors (see below), whose sum is σ = 294116543271936. Its totient is φ = 79374772736000.

The previous prime is 166106561116109. The next prime is 166106561116157. The reversal of 166106561116155 is 551611165601661.

It is not a de Polignac number, because 166106561116155 - 2²⁷ = 166106426898427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166106561116098 and 166106561116107.

It is not an unprimeable number, because it can be changed into a prime (166106561116157) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31491175 + ... + 36385535.

It is an arithmetic number, because the mean of its divisors is an integer number (4595570988624).

Almost surely, 2^{166106561116155} is an apocalyptic number.

166106561116155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166106561116155 is a deficient number, since it is larger than the sum of its proper divisors (128009982155781).

166106561116155 is a wasteful number, since it uses less digits than its factorization.

166106561116155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4897348.

The product of its (nonzero) digits is 972000, while the sum is 51.

The spelling of 166106561116155 in words is "one hundred sixty-six trillion, one hundred six billion, five hundred sixty-one million, one hundred sixteen thousand, one hundred fifty-five".