166118387 has 8 divisors (see below), whose sum is σ = 174983760. Its totient is φ = 157265280.

The previous prime is 166118371. The next prime is 166118389. The reversal of 166118387 is 783811661.

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

It is not a de Polignac number, because 166118387 - 2⁴ = 166118371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166118389) 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, 41423 + ... + 45255.

It is an arithmetic number, because the mean of its divisors is an integer number (21872970).

Almost surely, 2^166118387 is an apocalyptic number.

166118387 is a deficient number, since it is larger than the sum of its proper divisors (8865373).

166118387 is a wasteful number, since it uses less digits than its factorization.

166118387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6133.

The product of its digits is 48384, while the sum is 41.

The square root of 166118387 is about 12888.6922144956. The cubic root of 166118387 is about 549.7170853504.

The spelling of 166118387 in words is "one hundred sixty-six million, one hundred eighteen thousand, three hundred eighty-seven".