166022403 has 4 divisors (see below), whose sum is σ = 221363208. Its totient is φ = 110681600.

The previous prime is 166022393. The next prime is 166022411. The reversal of 166022403 is 304220661.

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

It is a cyclic number.

It is not a de Polignac number, because 166022403 - 2²⁶ = 98913539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166022413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27670398 + ... + 27670403.

It is an arithmetic number, because the mean of its divisors is an integer number (55340802).

Almost surely, 2^166022403 is an apocalyptic number.

166022403 is a deficient number, since it is larger than the sum of its proper divisors (55340805).

166022403 is an equidigital number, since it uses as much as digits as its factorization.

166022403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55340804.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 166022403 is about 12884.9681024052. The cubic root of 166022403 is about 549.6111885632.

The spelling of 166022403 in words is "one hundred sixty-six million, twenty-two thousand, four hundred three".