166888361 has 8 divisors (see below), whose sum is σ = 170440200. Its totient is φ = 163351552.

The previous prime is 166888313. The next prime is 166888387. The reversal of 166888361 is 163888661.

166888361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 77774761 + 89113600 = 8819^2 + 9440^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 166888361 - 2⁶ = 166888297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166888661) 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, 20291 + ... + 27303.

It is an arithmetic number, because the mean of its divisors is an integer number (21305025).

Almost surely, 2^166888361 is an apocalyptic number.

It is an amenable number.

166888361 is a deficient number, since it is larger than the sum of its proper divisors (3551839).

166888361 is an equidigital number, since it uses as much as digits as its factorization.

166888361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7515.

The product of its digits is 331776, while the sum is 47.

The square root of 166888361 is about 12918.5278186022. The cubic root of 166888361 is about 550.5651062261.

The spelling of 166888361 in words is "one hundred sixty-six million, eight hundred eighty-eight thousand, three hundred sixty-one".