2661822 has 24 divisors (see below), whose sum is σ = 5981976. Its totient is φ = 887112.

The previous prime is 2661821. The next prime is 2661833. The reversal of 2661822 is 2281662.

2661822 is a `hidden beast` number, since 26 + 618 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2253 + ... + 3224.

It is an arithmetic number, because the mean of its divisors is an integer number (249249).

2^2661822 is an apocalyptic number.

2661822 is an abundant number, since it is smaller than the sum of its proper divisors (3320154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2661822 is an equidigital number, since it uses as much as digits as its factorization.

2661822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5494 (or 5482 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 2661822 is about 1631.5091173512. The cubic root of 2661822 is about 138.5882263570.

The spelling of 2661822 in words is "two million, six hundred sixty-one thousand, eight hundred twenty-two".