166065663 has 24 divisors (see below), whose sum is σ = 229062400. Its totient is φ = 106994160.

The previous prime is 166065637. The next prime is 166065671. The reversal of 166065663 is 366560661.

It is not a de Polignac number, because 166065663 - 2¹³ = 166057471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166065563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1194648 + ... + 1194786.

Almost surely, 2^166065663 is an apocalyptic number.

166065663 is a deficient number, since it is larger than the sum of its proper divisors (62996737).

166065663 is an equidigital number, since it uses as much as digits as its factorization.

166065663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 166065663 is about 12886.6466933799. The cubic root of 166065663 is about 549.6589213085.

The spelling of 166065663 in words is "one hundred sixty-six million, sixty-five thousand, six hundred sixty-three".