166605161566050 has 36 divisors (see below), whose sum is σ = 447612534075330. Its totient is φ = 44428043084160.

The previous prime is 166605161566037. The next prime is 166605161566073. The reversal of 166605161566050 is 50665161506661.

166605161566050 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 3 ways, for example, as 150599505066201 + 16005656499849 = 12271899^2 + 4000707^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 185116845735 + ... + 185116846634.

Almost surely, 2^{166605161566050} is an apocalyptic number.

166605161566050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166605161566050 is an abundant number, since it is smaller than the sum of its proper divisors (281007372509280).

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

166605161566050 is a wasteful number, since it uses less digits than its factorization.

166605161566050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370233692387 (or 370233692379 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 54.

The spelling of 166605161566050 in words is "one hundred sixty-six trillion, six hundred five billion, one hundred sixty-one million, five hundred sixty-six thousand, fifty".