166228774860 has 48 divisors (see below), whose sum is σ = 465648454656. Its totient is φ = 44307874752.

The previous prime is 166228774849. The next prime is 166228774861. The reversal of 166228774860 is 68477822661.

It is a self number, because there is not a number n which added to its sum of digits gives 166228774860.

It is not an unprimeable number, because it can be changed into a prime (166228774861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 483004 + ... + 752163.

It is an arithmetic number, because the mean of its divisors is an integer number (9701009472).

Almost surely, 2^166228774860 is an apocalyptic number.

166228774860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166228774860 is an abundant number, since it is smaller than the sum of its proper divisors (299419679796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166228774860 is a wasteful number, since it uses less digits than its factorization.

166228774860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237422 (or 1237420 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 57.

The spelling of 166228774860 in words is "one hundred sixty-six billion, two hundred twenty-eight million, seven hundred seventy-four thousand, eight hundred sixty".