166299949 has 4 divisors (see below), whose sum is σ = 172034460. Its totient is φ = 160565440.

The previous prime is 166299919. The next prime is 166299961. The reversal of 166299949 is 949992661.

166299949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 79530724 + 86769225 = 8918^2 + 9315^2 .

It is a cyclic number.

It is not a de Polignac number, because 166299949 - 2¹³ = 166291757 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166299949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166299919) 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, 2867212 + ... + 2867269.

It is an arithmetic number, because the mean of its divisors is an integer number (43008615).

Almost surely, 2^166299949 is an apocalyptic number.

It is an amenable number.

166299949 is a deficient number, since it is larger than the sum of its proper divisors (5734511).

166299949 is an equidigital number, since it uses as much as digits as its factorization.

166299949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5734510.

The product of its digits is 1889568, while the sum is 55.

The square root of 166299949 is about 12895.7337519042. The cubic root of 166299949 is about 549.9172867351.

The spelling of 166299949 in words is "one hundred sixty-six million, two hundred ninety-nine thousand, nine hundred forty-nine".