166115646605535 has 32 divisors (see below), whose sum is σ = 307003034587392. Its totient is φ = 75803218414080.

The previous prime is 166115646605507. The next prime is 166115646605543. The reversal of 166115646605535 is 535506646511661.

It is not a de Polignac number, because 166115646605535 - 2²² = 166115642411231 is a prime.

It is a congruent number.

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, 29610629389 + ... + 29610634998.

It is an arithmetic number, because the mean of its divisors is an integer number (9593844830856).

Almost surely, 2^{166115646605535} is an apocalyptic number.

166115646605535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166115646605535 is a deficient number, since it is larger than the sum of its proper divisors (140887387981857).

166115646605535 is a wasteful number, since it uses less digits than its factorization.

166115646605535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59221264423.

The product of its (nonzero) digits is 58320000, while the sum is 60.

The spelling of 166115646605535 in words is "one hundred sixty-six trillion, one hundred fifteen billion, six hundred forty-six million, six hundred five thousand, five hundred thirty-five".