162661441 has 4 divisors (see below), whose sum is σ = 165328084. Its totient is φ = 159994800.

The previous prime is 162661427. The next prime is 162661469. The reversal of 162661441 is 144166261.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1904400 + 160757041 = 1380^2 + 12679^2 .

It is a cyclic number.

It is not a de Polignac number, because 162661441 - 2¹⁷ = 162530369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162661481) 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, 1333230 + ... + 1333351.

It is an arithmetic number, because the mean of its divisors is an integer number (41332021).

Almost surely, 2^162661441 is an apocalyptic number.

It is an amenable number.

162661441 is a deficient number, since it is larger than the sum of its proper divisors (2666643).

162661441 is an equidigital number, since it uses as much as digits as its factorization.

162661441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2666642.

The product of its digits is 6912, while the sum is 31.

The square root of 162661441 is about 12753.8794490147. The cubic root of 162661441 is about 545.8770951116.

The spelling of 162661441 in words is "one hundred sixty-two million, six hundred sixty-one thousand, four hundred forty-one".