166755531615 has 32 divisors (see below), whose sum is σ = 279436732416. Its totient is φ = 84755531520.

The previous prime is 166755531581. The next prime is 166755531629. The reversal of 166755531615 is 516135557661.

It is not a de Polignac number, because 166755531615 - 2¹⁶ = 166755466079 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 798294 + ... + 985283.

It is an arithmetic number, because the mean of its divisors is an integer number (8732397888).

Almost surely, 2^166755531615 is an apocalyptic number.

166755531615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166755531615 is a deficient number, since it is larger than the sum of its proper divisors (112681200801).

166755531615 is a wasteful number, since it uses less digits than its factorization.

166755531615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783879.

The product of its digits is 2835000, while the sum is 51.

The spelling of 166755531615 in words is "one hundred sixty-six billion, seven hundred fifty-five million, five hundred thirty-one thousand, six hundred fifteen".