166671612 has 72 divisors (see below), whose sum is σ = 437813376. Its totient is φ = 53421984.

The previous prime is 166671611. The next prime is 166671623. The reversal of 166671612 is 216176661.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166671611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102913 + ... + 104519.

Almost surely, 2^166671612 is an apocalyptic number.

166671612 is a gapful number since it is divisible by the number (12) 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 166671612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218906688).

166671612 is an abundant number, since it is smaller than the sum of its proper divisors (271141764).

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

166671612 is a wasteful number, since it uses less digits than its factorization.

166671612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727 (or 1722 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 166671612 is about 12910.1360178737. The cubic root of 166671612 is about 550.3266511389.

The spelling of 166671612 in words is "one hundred sixty-six million, six hundred seventy-one thousand, six hundred twelve".