2661722 has 16 divisors (see below), whose sum is σ = 4710912. Its totient is φ = 1103760.

The previous prime is 2661689. The next prime is 2661731. The reversal of 2661722 is 2271662.

2661722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 2661691 and 2661700.

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 7 ways as a sum of consecutive naturals, for example, 2633 + ... + 3500.

It is an arithmetic number, because the mean of its divisors is an integer number (294432).

2^2661722 is an apocalyptic number.

2661722 is a deficient number, since it is larger than the sum of its proper divisors (2049190).

2661722 is a wasteful number, since it uses less digits than its factorization.

2661722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6173.

The product of its digits is 2016, while the sum is 26.

The square root of 2661722 is about 1631.4784705904. The cubic root of 2661722 is about 138.5864908294.

The spelling of 2661722 in words is "two million, six hundred sixty-one thousand, seven hundred twenty-two".