166730663 has 4 divisors (see below), whose sum is σ = 181888008. Its totient is φ = 151573320.

The previous prime is 166730659. The next prime is 166730671. The reversal of 166730663 is 366037661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166730663 - 2² = 166730659 is a prime.

It is a super-2 number, since 2×166730663² = 55598227968839138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166730623) 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, 7578656 + ... + 7578677.

It is an arithmetic number, because the mean of its divisors is an integer number (45472002).

Almost surely, 2^166730663 is an apocalyptic number.

166730663 is a deficient number, since it is larger than the sum of its proper divisors (15157345).

166730663 is a wasteful number, since it uses less digits than its factorization.

166730663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15157344.

The product of its (nonzero) digits is 81648, while the sum is 38.

The square root of 166730663 is about 12912.4228168071. The cubic root of 166730663 is about 550.3916362146.

The spelling of 166730663 in words is "one hundred sixty-six million, seven hundred thirty thousand, six hundred sixty-three".