2661885 has 24 divisors (see below), whose sum is σ = 4656600. Its totient is φ = 1406592.

The previous prime is 2661871. The next prime is 2661899. The reversal of 2661885 is 5881662.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2661871) and next prime (2661899).

It can be written as a sum of positive squares in 4 ways, for example, as 95481 + 2566404 = 309^2 + 1602^2 .

It is not a de Polignac number, because 2661885 - 2⁵ = 2661853 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6507 + ... + 6903.

It is an arithmetic number, because the mean of its divisors is an integer number (194025).

2^2661885 is an apocalyptic number.

It is an amenable number.

2661885 is a deficient number, since it is larger than the sum of its proper divisors (1994715).

2661885 is a wasteful number, since it uses less digits than its factorization.

2661885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557 (or 554 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 2661885 is about 1631.5284245149. The cubic root of 2661885 is about 138.5893197170.

The spelling of 2661885 in words is "two million, six hundred sixty-one thousand, eight hundred eighty-five".