2661418 has 8 divisors (see below), whose sum is σ = 4227012. Its totient is φ = 1252416.

The previous prime is 2661413. The next prime is 2661419. The reversal of 2661418 is 8141662.

It can be written as a sum of positive squares in 2 ways, for example, as 2569609 + 91809 = 1603^2 + 303^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2661413) 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, 39105 + ... + 39172.

2^2661418 is an apocalyptic number.

2661418 is a deficient number, since it is larger than the sum of its proper divisors (1565594).

2661418 is a wasteful number, since it uses less digits than its factorization.

2661418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78296.

The product of its digits is 2304, while the sum is 28.

The square root of 2661418 is about 1631.3853009023. The cubic root of 2661418 is about 138.5812145587.

The spelling of 2661418 in words is "two million, six hundred sixty-one thousand, four hundred eighteen".