166480287 has 4 divisors (see below), whose sum is σ = 221973720. Its totient is φ = 110986856.

The previous prime is 166480283. The next prime is 166480289. The reversal of 166480287 is 782084661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 782084661 = 3 ⋅260694887.

It is a cyclic number.

It is not a de Polignac number, because 166480287 - 2² = 166480283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166480283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27746712 + ... + 27746717.

It is an arithmetic number, because the mean of its divisors is an integer number (55493430).

Almost surely, 2^166480287 is an apocalyptic number.

166480287 is a deficient number, since it is larger than the sum of its proper divisors (55493433).

166480287 is an equidigital number, since it uses as much as digits as its factorization.

166480287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55493432.

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 166480287 is about 12902.7240147188. The cubic root of 166480287 is about 550.1159942680.

The spelling of 166480287 in words is "one hundred sixty-six million, four hundred eighty thousand, two hundred eighty-seven".