2661726723 has 4 divisors (see below), whose sum is σ = 3548968968. Its totient is φ = 1774484480.

The previous prime is 2661726719. The next prime is 2661726731. The reversal of 2661726723 is 3276271662.

2661726723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2661726723 - 2² = 2661726719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2661726713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443621118 + ... + 443621123.

It is an arithmetic number, because the mean of its divisors is an integer number (887242242).

Almost surely, 2^2661726723 is an apocalyptic number.

2661726723 is a deficient number, since it is larger than the sum of its proper divisors (887242245).

2661726723 is an equidigital number, since it uses as much as digits as its factorization.

2661726723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887242244.

The product of its digits is 254016, while the sum is 42.

The square root of 2661726723 is about 51591.9249786243. The cubic root of 2661726723 is about 1385.8657279935.

The spelling of 2661726723 in words is "two billion, six hundred sixty-one million, seven hundred twenty-six thousand, seven hundred twenty-three".