166661510144250 has 64 divisors (see below), whose sum is σ = 453804141098880. Its totient is φ = 40402790336000.

The previous prime is 166661510144237. The next prime is 166661510144263. The reversal of 166661510144250 is 52441015166661.

166661510144250 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (166661510144237) and next prime (166661510144263).

It is a self number, because there is not a number n which added to its sum of digits gives 166661510144250.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 10100689335 + ... + 10100705834.

It is an arithmetic number, because the mean of its divisors is an integer number (7090689704670).

Almost surely, 2^{166661510144250} is an apocalyptic number.

166661510144250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166661510144250 is an abundant number, since it is smaller than the sum of its proper divisors (287142630954630).

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

166661510144250 is a wasteful number, since it uses less digits than its factorization.

166661510144250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20201395200 (or 20201395190 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 166661510144250 in words is "one hundred sixty-six trillion, six hundred sixty-one billion, five hundred ten million, one hundred forty-four thousand, two hundred fifty".