166545421219368 has 48 divisors (see below), whose sum is σ = 451482462237300. Its totient is φ = 55463208537600.

The previous prime is 166545421219367. The next prime is 166545421219447. The reversal of 166545421219368 is 863912124545661.

166545421219368 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 4 + 54 + 2 + 1 + 219 + 368 = 666.

166545421219368 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 166545167836644 + 253382724 = 12905238^2 + 15918^2 .

It is not an unprimeable number, because it can be changed into a prime (166545421219367) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1081836433 + ... + 1081990368.

Almost surely, 2^{166545421219368} is an apocalyptic number.

166545421219368 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

166545421219368 is an abundant number, since it is smaller than the sum of its proper divisors (284937041017932).

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

166545421219368 is a wasteful number, since it uses less digits than its factorization.

166545421219368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163827882 (or 2163827875 counting only the distinct ones).

The product of its digits is 74649600, while the sum is 63.

The spelling of 166545421219368 in words is "one hundred sixty-six trillion, five hundred forty-five billion, four hundred twenty-one million, two hundred nineteen thousand, three hundred sixty-eight".