166819848500 has 24 divisors (see below), whose sum is σ = 364334550216. Its totient is φ = 66727939200.

The previous prime is 166819848499. The next prime is 166819848509. The reversal of 166819848500 is 5848918661.

It can be written as a sum of positive squares in 4 ways, for example, as 20668087696 + 146151760804 = 143764^2 + 382298^2 .

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166819848509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166819349 + ... + 166820348.

It is an arithmetic number, because the mean of its divisors is an integer number (15180606259).

Almost surely, 2^166819848500 is an apocalyptic number.

166819848500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166819848500 is an abundant number, since it is smaller than the sum of its proper divisors (197514701716).

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

166819848500 is a wasteful number, since it uses less digits than its factorization.

166819848500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333639716 (or 333639704 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 56.

The spelling of 166819848500 in words is "one hundred sixty-six billion, eight hundred nineteen million, eight hundred forty-eight thousand, five hundred".