166217712 has 40 divisors (see below), whose sum is σ = 430235856. Its totient is φ = 55297536.

The previous prime is 166217693. The next prime is 166217713. The reversal of 166217712 is 217712661.

166217712 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166217713) 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, 23628 + ... + 29844.

Almost surely, 2^166217712 is an apocalyptic number.

166217712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166217712 is an abundant number, since it is smaller than the sum of its proper divisors (264018144).

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

166217712 is a wasteful number, since it uses less digits than its factorization.

166217712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6785 (or 6779 counting only the distinct ones).

The product of its digits is 7056, while the sum is 33.

The square root of 166217712 is about 12892.5448224933. The cubic root of 166217712 is about 549.8266252432.

The spelling of 166217712 in words is "one hundred sixty-six million, two hundred seventeen thousand, seven hundred twelve".