166363426 has 4 divisors (see below), whose sum is σ = 249545142. Its totient is φ = 83181712.

The previous prime is 166363397. The next prime is 166363429. The reversal of 166363426 is 624363661.

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

It can be written as a sum of positive squares in only one way, i.e., 139830625 + 26532801 = 11825^2 + 5151^2 .

It is not an unprimeable number, because it can be changed into a prime (166363429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41590855 + ... + 41590858.

Almost surely, 2^166363426 is an apocalyptic number.

166363426 is a deficient number, since it is larger than the sum of its proper divisors (83181716).

166363426 is an equidigital number, since it uses as much as digits as its factorization.

166363426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83181715.

The product of its digits is 93312, while the sum is 37.

The square root of 166363426 is about 12898.1946798767. The cubic root of 166363426 is about 549.9872459852.

The spelling of 166363426 in words is "one hundred sixty-six million, three hundred sixty-three thousand, four hundred twenty-six".