166888533718 has 4 divisors (see below), whose sum is σ = 250332800580. Its totient is φ = 83444266858.

The previous prime is 166888533653. The next prime is 166888533719. The reversal of 166888533718 is 817335888661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 817335888661 = 37 ⋅22090159153.

It is a self number, because there is not a number n which added to its sum of digits gives 166888533718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166888533719) by changing a digit.

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 as a sum of consecutive naturals, namely, 41722133428 + ... + 41722133431.

It is an arithmetic number, because the mean of its divisors is an integer number (62583200145).

Almost surely, 2^166888533718 is an apocalyptic number.

166888533718 is a deficient number, since it is larger than the sum of its proper divisors (83444266862).

166888533718 is an equidigital number, since it uses as much as digits as its factorization.

166888533718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83444266861.

The product of its digits is 46448640, while the sum is 64.

The spelling of 166888533718 in words is "one hundred sixty-six billion, eight hundred eighty-eight million, five hundred thirty-three thousand, seven hundred eighteen".