2661723 has 12 divisors (see below), whose sum is σ = 3889080. Its totient is φ = 1754016.

The previous prime is 2661689. The next prime is 2661731. The reversal of 2661723 is 3271662.

It is a happy number.

2661723 is a `hidden beast` number, since 26 + 617 + 23 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-2661723 is a prime.

It is a d-powerful number, because it can be written as 2⁵ + 6⁵ + 6⁸ + 1 + 7⁷ + 2¹⁷ + 3⁹ .

2661723 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2661733) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 861 + ... + 2462.

It is an arithmetic number, because the mean of its divisors is an integer number (324090).

2^2661723 is an apocalyptic number.

2661723 is a deficient number, since it is larger than the sum of its proper divisors (1227357).

2661723 is a wasteful number, since it uses less digits than its factorization.

2661723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3418 (or 3415 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 2661723 is about 1631.4787770609. The cubic root of 2661723 is about 138.5865081849.

The spelling of 2661723 in words is "two million, six hundred sixty-one thousand, seven hundred twenty-three".