166229449 has 3 divisors (see below), whose sum is σ = 166242343. Its totient is φ = 166216556.

The previous prime is 166229447. The next prime is 166229467. The reversal of 166229449 is 944922661.

The square root of 166229449 is 12893.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 944922661 = 16889 ⋅55949.

It can be written as a sum of positive squares in only one way, i.e., 100100025 + 66129424 = 10005^2 + 8132^2 .

It is not a de Polignac number, because 166229449 - 2¹ = 166229447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166229447) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6447 + ... + 19339.

Almost surely, 2^166229449 is an apocalyptic number.

166229449 is the 12893-rd square number.

166229449 is the 6447-th centered octagonal number.

It is an amenable number.

166229449 is a deficient number, since it is larger than the sum of its proper divisors (12894).

166229449 is an frugal number, since it uses more digits than its factorization.

166229449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25786 (or 12893 counting only the distinct ones).

The product of its digits is 186624, while the sum is 43.

The cubic root of 166229449 is about 549.8395664296.

Multiplying 166229449 by its product of digits (186624), we get a square (31022404690176 = 5569776²).

The spelling of 166229449 in words is "one hundred sixty-six million, two hundred twenty-nine thousand, four hundred forty-nine".