2661812 has 12 divisors (see below), whose sum is σ = 4711140. Its totient is φ = 1315776.

The previous prime is 2661797. The next prime is 2661821. The reversal of 2661812 is 2181662.

2661812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1653796 + 1008016 = 1286^2 + 1004^2 .

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3383 + ... + 4094.

It is an arithmetic number, because the mean of its divisors is an integer number (392595).

2^2661812 is an apocalyptic number.

It is an amenable number.

2661812 is a deficient number, since it is larger than the sum of its proper divisors (2049328).

2661812 is a wasteful number, since it uses less digits than its factorization.

2661812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7570 (or 7568 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 2661812 is about 1631.5060527010. The cubic root of 2661812 is about 138.5880528062.

The spelling of 2661812 in words is "two million, six hundred sixty-one thousand, eight hundred twelve".