166665214 has 8 divisors (see below), whose sum is σ = 250369128. Its totient is φ = 83208840.

The previous prime is 166665203. The next prime is 166665281. The reversal of 166665214 is 412566661.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60192 + ... + 62899.

It is an arithmetic number, because the mean of its divisors is an integer number (31296141).

Almost surely, 2^166665214 is an apocalyptic number.

166665214 is a deficient number, since it is larger than the sum of its proper divisors (83703914).

166665214 is a wasteful number, since it uses less digits than its factorization.

166665214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123770.

The product of its digits is 51840, while the sum is 37.

The square root of 166665214 is about 12909.8882256974. Note that the first 3 decimals coincide. The cubic root of 166665214 is about 550.3196092779.

The spelling of 166665214 in words is "one hundred sixty-six million, six hundred sixty-five thousand, two hundred fourteen".