2723666065 has 4 divisors (see below), whose sum is σ = 3268399284. Its totient is φ = 2178932848.

The previous prime is 2723666063. The next prime is 2723666069. The reversal of 2723666065 is 5606663272.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2094709824 + 628956241 = 45768^2 + 25079^2 .

It is a cyclic number.

It is not a de Polignac number, because 2723666065 - 2¹ = 2723666063 is a prime.

It is a super-4 number, since 4×2723666065⁴ (a number of 39 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2723666063) 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, 272366602 + ... + 272366611.

It is an arithmetic number, because the mean of its divisors is an integer number (817099821).

Almost surely, 2^2723666065 is an apocalyptic number.

It is an amenable number.

2723666065 is a deficient number, since it is larger than the sum of its proper divisors (544733219).

2723666065 is an equidigital number, since it uses as much as digits as its factorization.

2723666065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544733218.

The product of its (nonzero) digits is 544320, while the sum is 43.

The square root of 2723666065 is about 52188.7542004980. The cubic root of 2723666065 is about 1396.5332704363.

The spelling of 2723666065 in words is "two billion, seven hundred twenty-three million, six hundred sixty-six thousand, sixty-five".