2661189 has 8 divisors (see below), whose sum is σ = 3588480. Its totient is φ = 1754016.

The previous prime is 2661181. The next prime is 2661199. The reversal of 2661189 is 9811662.

2661189 = 127² + 128² + ... + 215².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2661189 - 2³ = 2661181 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4717 + ... + 5250.

It is an arithmetic number, because the mean of its divisors is an integer number (448560).

2^2661189 is an apocalyptic number.

It is an amenable number.

2661189 is a deficient number, since it is larger than the sum of its proper divisors (927291).

2661189 is an equidigital number, since it uses as much as digits as its factorization.

2661189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10059.

The product of its digits is 5184, while the sum is 33.

The square root of 2661189 is about 1631.3151136430. The cubic root of 2661189 is about 138.5772397342.

It can be divided in two parts, 2661 and 189, that added together give a triangular number (2850 = T₇₅).

The spelling of 2661189 in words is "two million, six hundred sixty-one thousand, one hundred eighty-nine".