166601441 has 4 divisors (see below), whose sum is σ = 168710400. Its totient is φ = 164492484.

The previous prime is 166601423. The next prime is 166601473. The reversal of 166601441 is 144106661.

166601441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 144106661 = 23 ⋅6265507.

It is a cyclic number.

It is not a de Polignac number, because 166601441 - 2²⁶ = 99492577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166601401) 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, 1054361 + ... + 1054518.

It is an arithmetic number, because the mean of its divisors is an integer number (42177600).

Almost surely, 2^166601441 is an apocalyptic number.

It is an amenable number.

166601441 is a deficient number, since it is larger than the sum of its proper divisors (2108959).

166601441 is an equidigital number, since it uses as much as digits as its factorization.

166601441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108958.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 166601441 is about 12907.4180609446. The cubic root of 166601441 is about 550.2494086466.

The spelling of 166601441 in words is "one hundred sixty-six million, six hundred one thousand, four hundred forty-one".