2661823 has 8 divisors (see below), whose sum is σ = 2772000. Its totient is φ = 2552928.

The previous prime is 2661821. The next prime is 2661833. The reversal of 2661823 is 3281662.

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

It is not a de Polignac number, because 2661823 - 2¹ = 2661821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2661791 and 2661800.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7453 + ... + 7801.

It is an arithmetic number, because the mean of its divisors is an integer number (346500).

2^2661823 is an apocalyptic number.

2661823 is a deficient number, since it is larger than the sum of its proper divisors (110177).

2661823 is a wasteful number, since it uses less digits than its factorization.

2661823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641.

The product of its digits is 3456, while the sum is 28.

The square root of 2661823 is about 1631.5094238159. The cubic root of 2661823 is about 138.5882437120.

It can be divided in two parts, 2 and 661823, that added together give a triangular number (661825 = T₁₁₅₀).

The spelling of 2661823 in words is "two million, six hundred sixty-one thousand, eight hundred twenty-three".