166670027 has 4 divisors (see below), whose sum is σ = 166710840. Its totient is φ = 166629216.

The previous prime is 166670017. The next prime is 166670051. The reversal of 166670027 is 720076661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 720076661 = 89 ⋅8090749.

It is a cyclic number.

It is not a de Polignac number, because 166670027 - 2⁴ = 166670011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166670017) 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, 13502 + ... + 22707.

It is an arithmetic number, because the mean of its divisors is an integer number (41677710).

Almost surely, 2^166670027 is an apocalyptic number.

166670027 is a deficient number, since it is larger than the sum of its proper divisors (40813).

166670027 is an equidigital number, since it uses as much as digits as its factorization.

166670027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40812.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 166670027 is about 12910.0746318524. The cubic root of 166670027 is about 550.3249066496.

The spelling of 166670027 in words is "one hundred sixty-six million, six hundred seventy thousand, twenty-seven".