166446453 has 4 divisors (see below), whose sum is σ = 221928608. Its totient is φ = 110964300.

The previous prime is 166446451. The next prime is 166446463. The reversal of 166446453 is 354644661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 166446453 - 2¹ = 166446451 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 (166446451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27741073 + ... + 27741078.

It is an arithmetic number, because the mean of its divisors is an integer number (55482152).

Almost surely, 2^166446453 is an apocalyptic number.

It is an amenable number.

166446453 is a deficient number, since it is larger than the sum of its proper divisors (55482155).

166446453 is an equidigital number, since it uses as much as digits as its factorization.

166446453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55482154.

The product of its digits is 207360, while the sum is 39.

The square root of 166446453 is about 12901.4128296090. The cubic root of 166446453 is about 550.0787248193.

The spelling of 166446453 in words is "one hundred sixty-six million, four hundred forty-six thousand, four hundred fifty-three".