166556541700 has 36 divisors (see below), whose sum is σ = 362771351460. Its totient is φ = 66374938240.

The previous prime is 166556541637. The next prime is 166556541707. The reversal of 166556541700 is 7145655661.

It can be written as a sum of positive squares in 6 ways, for example, as 85072555584 + 81483986116 = 291672^2 + 285454^2 .

It is not an unprimeable number, because it can be changed into a prime (166556541707) 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, 3068947 + ... + 3122746.

It is an arithmetic number, because the mean of its divisors is an integer number (10076981985).

Almost surely, 2^166556541700 is an apocalyptic number.

166556541700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166556541700 is an abundant number, since it is smaller than the sum of its proper divisors (196214809760).

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

166556541700 is a wasteful number, since it uses less digits than its factorization.

166556541700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6191976 (or 6191969 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 46.

The spelling of 166556541700 in words is "one hundred sixty-six billion, five hundred fifty-six million, five hundred forty-one thousand, seven hundred".