166499943 has 8 divisors (see below), whose sum is σ = 222457728. Its totient is φ = 110771064.

The previous prime is 166499929. The next prime is 166499953. The reversal of 166499943 is 349994661.

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

It is not a de Polignac number, because 166499943 - 2¹⁶ = 166434407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166499923) 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, 55521 + ... + 58442.

It is an arithmetic number, because the mean of its divisors is an integer number (27807216).

Almost surely, 2^166499943 is an apocalyptic number.

166499943 is a deficient number, since it is larger than the sum of its proper divisors (55957785).

166499943 is a wasteful number, since it uses less digits than its factorization.

166499943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114453.

The product of its digits is 1259712, while the sum is 51.

The square root of 166499943 is about 12903.4856918586. The cubic root of 166499943 is about 550.1376437871.

The spelling of 166499943 in words is "one hundred sixty-six million, four hundred ninety-nine thousand, nine hundred forty-three".