166218166 has 8 divisors (see below), whose sum is σ = 249489504. Its totient is φ = 83055000.

The previous prime is 166218161. The next prime is 166218191. The reversal of 166218166 is 661812661.

166218166 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166218161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23085 + ... + 29416.

It is an arithmetic number, because the mean of its divisors is an integer number (31186188).

Almost surely, 2^166218166 is an apocalyptic number.

166218166 is a deficient number, since it is larger than the sum of its proper divisors (83271338).

166218166 is a wasteful number, since it uses less digits than its factorization.

166218166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54086.

The product of its digits is 20736, while the sum is 37.

The square root of 166218166 is about 12892.5624295560. The cubic root of 166218166 is about 549.8271258338.

The spelling of 166218166 in words is "one hundred sixty-six million, two hundred eighteen thousand, one hundred sixty-six".