166845666890 has 48 divisors (see below), whose sum is σ = 364543742592. Its totient is φ = 54717084576.

The previous prime is 166845666857. The next prime is 166845666899. The reversal of 166845666890 is 98666548661.

166845666890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (166845666899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7390934 + ... + 7413473.

It is an arithmetic number, because the mean of its divisors is an integer number (7594661304).

Almost surely, 2^166845666890 is an apocalyptic number.

166845666890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166845666890 is an abundant number, since it is smaller than the sum of its proper divisors (197698075702).

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

166845666890 is a wasteful number, since it uses less digits than its factorization.

166845666890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14804451 (or 14804444 counting only the distinct ones).

The product of its (nonzero) digits is 89579520, while the sum is 65.

The spelling of 166845666890 in words is "one hundred sixty-six billion, eight hundred forty-five million, six hundred sixty-six thousand, eight hundred ninety".