166987700 has 144 divisors (see below), whose sum is σ = 419973120. Its totient is φ = 57072000.

The previous prime is 166987679. The next prime is 166987703. The reversal of 166987700 is 7789661.

166987700 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166987703) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2011859 + ... + 2011941.

It is an arithmetic number, because the mean of its divisors is an integer number (2916480).

Almost surely, 2^166987700 is an apocalyptic number.

166987700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166987700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209986560).

166987700 is an abundant number, since it is smaller than the sum of its proper divisors (252985420).

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

166987700 is a wasteful number, since it uses less digits than its factorization.

166987700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 166987700 is about 12922.3720732689. The cubic root of 166987700 is about 550.6743244256.

The spelling of 166987700 in words is "one hundred sixty-six million, nine hundred eighty-seven thousand, seven hundred".