166938663 has 8 divisors (see below), whose sum is σ = 225634288. Its totient is φ = 109767744.

The previous prime is 166938659. The next prime is 166938683. The reversal of 166938663 is 366839661.

166938663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 166938663 - 2² = 166938659 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 (166938683) 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, 380920 + ... + 381357.

It is an arithmetic number, because the mean of its divisors is an integer number (28204286).

Almost surely, 2^166938663 is an apocalyptic number.

166938663 is a deficient number, since it is larger than the sum of its proper divisors (58695625).

166938663 is an equidigital number, since it uses as much as digits as its factorization.

166938663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762353.

The product of its digits is 839808, while the sum is 48.

The square root of 166938663 is about 12920.4745655878. The cubic root of 166938663 is about 550.6204161427.

The spelling of 166938663 in words is "one hundred sixty-six million, nine hundred thirty-eight thousand, six hundred sixty-three".