166936389 has 8 divisors (see below), whose sum is σ = 224056512. Its totient is φ = 110553600.

The previous prime is 166936387. The next prime is 166936391. The reversal of 166936389 is 983639661.

It is an interprime number because it is at equal distance from previous prime (166936387) and next prime (166936391).

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

It is not a de Polignac number, because 166936389 - 2¹ = 166936387 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166936381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183804 + ... + 184709.

It is an arithmetic number, because the mean of its divisors is an integer number (28007064).

Almost surely, 2^166936389 is an apocalyptic number.

It is an amenable number.

166936389 is a deficient number, since it is larger than the sum of its proper divisors (57120123).

166936389 is a wasteful number, since it uses less digits than its factorization.

166936389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368667.

The product of its digits is 1259712, while the sum is 51.

The square root of 166936389 is about 12920.3865654244. The cubic root of 166936389 is about 550.6179159898.

The spelling of 166936389 in words is "one hundred sixty-six million, nine hundred thirty-six thousand, three hundred eighty-nine".