166514663 has 4 divisors (see below), whose sum is σ = 190302480. Its totient is φ = 142726848.

The previous prime is 166514627. The next prime is 166514729. The reversal of 166514663 is 366415661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366415661 = 2341 ⋅156521.

It is a cyclic number.

It is not a de Polignac number, because 166514663 - 2⁶ = 166514599 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 (166514603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11893898 + ... + 11893911.

It is an arithmetic number, because the mean of its divisors is an integer number (47575620).

Almost surely, 2^166514663 is an apocalyptic number.

166514663 is a deficient number, since it is larger than the sum of its proper divisors (23787817).

166514663 is an equidigital number, since it uses as much as digits as its factorization.

166514663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23787816.

The product of its digits is 77760, while the sum is 38.

The square root of 166514663 is about 12904.0560677641. The cubic root of 166514663 is about 550.1538555794.

The spelling of 166514663 in words is "one hundred sixty-six million, five hundred fourteen thousand, six hundred sixty-three".