166402273 has 4 divisors (see below), whose sum is σ = 176190660. Its totient is φ = 156613888.

The previous prime is 166402237. The next prime is 166402277. The reversal of 166402273 is 372204661.

166402273 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 66961489 + 99440784 = 8183^2 + 9972^2 .

It is a cyclic number.

It is not a de Polignac number, because 166402273 - 2¹⁷ = 166271201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166402277) 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, 4894168 + ... + 4894201.

It is an arithmetic number, because the mean of its divisors is an integer number (44047665).

Almost surely, 2^166402273 is an apocalyptic number.

It is an amenable number.

166402273 is a deficient number, since it is larger than the sum of its proper divisors (9788387).

166402273 is an equidigital number, since it uses as much as digits as its factorization.

166402273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9788386.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 166402273 is about 12899.7005003992. The cubic root of 166402273 is about 550.0300512506.

The spelling of 166402273 in words is "one hundred sixty-six million, four hundred two thousand, two hundred seventy-three".