144688661 has 16 divisors (see below), whose sum is σ = 158336640. Its totient is φ = 131419200.

The previous prime is 144688651. The next prime is 144688669. The reversal of 144688661 is 166886441.

144688661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 144688661 - 2¹⁰ = 144687637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144688669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345110 + ... + 345528.

It is an arithmetic number, because the mean of its divisors is an integer number (9896040).

Almost surely, 2^144688661 is an apocalyptic number.

It is an amenable number.

144688661 is a deficient number, since it is larger than the sum of its proper divisors (13647979).

144688661 is a wasteful number, since it uses less digits than its factorization.

144688661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796.

The product of its digits is 221184, while the sum is 44.

The square root of 144688661 is about 12028.6599835559. The cubic root of 144688661 is about 524.9825070513.

The spelling of 144688661 in words is "one hundred forty-four million, six hundred eighty-eight thousand, six hundred sixty-one".