166427663 has 8 divisors (see below), whose sum is σ = 168947328. Its totient is φ = 163914624.

The previous prime is 166427647. The next prime is 166427689. The reversal of 166427663 is 366724661.

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 166427663 - 2⁴ = 166427647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166427663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166427363) 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, 74306 + ... + 76512.

It is an arithmetic number, because the mean of its divisors is an integer number (21118416).

Almost surely, 2^166427663 is an apocalyptic number.

166427663 is a deficient number, since it is larger than the sum of its proper divisors (2519665).

166427663 is a wasteful number, since it uses less digits than its factorization.

166427663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3313.

The product of its digits is 217728, while the sum is 41.

The square root of 166427663 is about 12900.6845942376. The cubic root of 166427663 is about 550.0580247322.

The spelling of 166427663 in words is "one hundred sixty-six million, four hundred twenty-seven thousand, six hundred sixty-three".