166642263432 has 36 divisors (see below), whose sum is σ = 451332178245. Its totient is φ = 55546266528.

The previous prime is 166642263421. The next prime is 166642263439. The reversal of 166642263432 is 234362246661.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 166077440676 + 564822756 = 407526^2 + 23766^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=288654.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (166642263439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3439794 + ... + 3487902.

Almost surely, 2^166642263432 is an apocalyptic number.

166642263432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166642263432 is an abundant number, since it is smaller than the sum of its proper divisors (284689914813).

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

166642263432 is an frugal number, since it uses more digits than its factorization.

166642263432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96230 (or 48114 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 45.

The spelling of 166642263432 in words is "one hundred sixty-six billion, six hundred forty-two million, two hundred sixty-three thousand, four hundred thirty-two".