166497889 has 8 divisors (see below), whose sum is σ = 170117120. Its totient is φ = 162914976.

The previous prime is 166497871. The next prime is 166497913. The reversal of 166497889 is 988794661.

166497889 is digitally balanced in base 2, because in such base 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 not a de Polignac number, because 166497889 - 2¹⁵ = 166465121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166497689) 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, 292 + ... + 18250.

It is an arithmetic number, because the mean of its divisors is an integer number (21264640).

Almost surely, 2^166497889 is an apocalyptic number.

It is an amenable number.

166497889 is a deficient number, since it is larger than the sum of its proper divisors (3619231).

166497889 is a wasteful number, since it uses less digits than its factorization.

166497889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18159.

The product of its digits is 5225472, while the sum is 58.

The square root of 166497889 is about 12903.4061007162. The cubic root of 166497889 is about 550.1353815494.

The spelling of 166497889 in words is "one hundred sixty-six million, four hundred ninety-seven thousand, eight hundred eighty-nine".