166228741 has 4 divisors (see below), whose sum is σ = 189975712. Its totient is φ = 142481772.

The previous prime is 166228693. The next prime is 166228781. The reversal of 166228741 is 147822661.

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 a cyclic number.

It is not a de Polignac number, because 166228741 - 2¹⁵ = 166195973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166228741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166228781) 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, 11873475 + ... + 11873488.

It is an arithmetic number, because the mean of its divisors is an integer number (47493928).

Almost surely, 2^166228741 is an apocalyptic number.

It is an amenable number.

166228741 is a deficient number, since it is larger than the sum of its proper divisors (23746971).

166228741 is an equidigital number, since it uses as much as digits as its factorization.

166228741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23746970.

The product of its digits is 32256, while the sum is 37.

The square root of 166228741 is about 12892.9725432113. The cubic root of 166228741 is about 549.8387858079.

It can be divided in two parts, 1662 and 28741, that added together give a palindrome (30403).

The spelling of 166228741 in words is "one hundred sixty-six million, two hundred twenty-eight thousand, seven hundred forty-one".