166089387 has 8 divisors (see below), whose sum is σ = 221527504. Its totient is φ = 110688768.

The previous prime is 166089379. The next prime is 166089403. The reversal of 166089387 is 783980661.

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

It is not a de Polignac number, because 166089387 - 2³ = 166089379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166089367) 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, 3483 + ... + 18555.

It is an arithmetic number, because the mean of its divisors is an integer number (27690938).

Almost surely, 2^166089387 is an apocalyptic number.

166089387 is a deficient number, since it is larger than the sum of its proper divisors (55438117).

166089387 is a wasteful number, since it uses less digits than its factorization.

166089387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18749.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 166089387 is about 12887.5671482247. The cubic root of 166089387 is about 549.6850946649.

The spelling of 166089387 in words is "one hundred sixty-six million, eighty-nine thousand, three hundred eighty-seven".