2661726722 has 10 divisors (see below), whose sum is σ = 4013603715. Its totient is φ = 1323895490.

The previous prime is 2661726719. The next prime is 2661726731. The reversal of 2661726722 is 2276271662.

It can be written as a sum of positive squares in only one way, i.e., 1330863361 + 1330863361 = 36481^2 + 36481^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=36481.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2661726722.

It is an unprimeable number.

It is a polite number, since it can be written in 4 ways as a sum of consecutive naturals, for example, 13935647 + ... + 13935837.

Almost surely, 2^2661726722 is an apocalyptic number.

2661726722 is a deficient number, since it is larger than the sum of its proper divisors (1351876993).

2661726722 is an frugal number, since it uses more digits than its factorization.

2661726722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766 (or 193 counting only the distinct ones).

The product of its digits is 169344, while the sum is 41.

The square root of 2661726722 is about 51591.9249689329. The cubic root of 2661726722 is about 1385.8657278200.

The spelling of 2661726722 in words is "two billion, six hundred sixty-one million, seven hundred twenty-six thousand, seven hundred twenty-two".