166246889 has 4 divisors (see below), whose sum is σ = 168351360. Its totient is φ = 164142420.

The previous prime is 166246877. The next prime is 166246907. The reversal of 166246889 is 988642661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 166246889 - 2²⁴ = 149469673 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166246819) 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, 1052117 + ... + 1052274.

It is an arithmetic number, because the mean of its divisors is an integer number (42087840).

Almost surely, 2^166246889 is an apocalyptic number.

It is an amenable number.

166246889 is a deficient number, since it is larger than the sum of its proper divisors (2104471).

166246889 is an equidigital number, since it uses as much as digits as its factorization.

166246889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104470.

The product of its digits is 995328, while the sum is 50.

The square root of 166246889 is about 12893.6763182577. The cubic root of 166246889 is about 549.8587946044.

The spelling of 166246889 in words is "one hundred sixty-six million, two hundred forty-six thousand, eight hundred eighty-nine".