166844413 has 4 divisors (see below), whose sum is σ = 167067328. Its totient is φ = 166621500.

The previous prime is 166844401. The next prime is 166844417. The reversal of 166844413 is 314448661.

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 a de Polignac number, because none of the positive numbers 2^k-166844413 is a prime.

It is a super-3 number, since 3×166844413³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166844417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110331 + ... + 111832.

It is an arithmetic number, because the mean of its divisors is an integer number (41766832).

Almost surely, 2^166844413 is an apocalyptic number.

It is an amenable number.

166844413 is a deficient number, since it is larger than the sum of its proper divisors (222915).

166844413 is an equidigital number, since it uses as much as digits as its factorization.

166844413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222914.

The product of its digits is 55296, while the sum is 37.

The square root of 166844413 is about 12916.8267387931. The cubic root of 166844413 is about 550.5167737972.

The spelling of 166844413 in words is "one hundred sixty-six million, eight hundred forty-four thousand, four hundred thirteen".