2661955 has 4 divisors (see below), whose sum is σ = 3194352. Its totient is φ = 2129560.

The previous prime is 2661949. The next prime is 2661959. The reversal of 2661955 is 5591662.

It is a happy number.

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

It is not a de Polignac number, because 2661955 - 2³ = 2661947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2661955.

It is not an unprimeable number, because it can be changed into a prime (2661959) 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, 266191 + ... + 266200.

It is an arithmetic number, because the mean of its divisors is an integer number (798588).

2^2661955 is an apocalyptic number.

2661955 is a deficient number, since it is larger than the sum of its proper divisors (532397).

2661955 is an equidigital number, since it uses as much as digits as its factorization.

2661955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532396.

The product of its digits is 16200, while the sum is 34.

The square root of 2661955 is about 1631.5498766510. The cubic root of 2661955 is about 138.5905345412.

The spelling of 2661955 in words is "two million, six hundred sixty-one thousand, nine hundred fifty-five".