2661586745 has 8 divisors (see below), whose sum is σ = 3222169416. Its totient is φ = 2110425856.

The previous prime is 2661586693. The next prime is 2661586799. The reversal of 2661586745 is 5476851662.

It can be written as a sum of positive squares in 4 ways, for example, as 282878761 + 2378707984 = 16819^2 + 48772^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2661586745 - 2¹⁶ = 2661521209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2661586693 and 2661586702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2354822 + ... + 2355951.

It is an arithmetic number, because the mean of its divisors is an integer number (402771177).

Almost surely, 2^2661586745 is an apocalyptic number.

It is an amenable number.

2661586745 is a deficient number, since it is larger than the sum of its proper divisors (560582671).

2661586745 is a wasteful number, since it uses less digits than its factorization.

2661586745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4710891.

The product of its digits is 2419200, while the sum is 50.

The square root of 2661586745 is about 51590.5683725233. The cubic root of 2661586745 is about 1385.8414337247.

The spelling of 2661586745 in words is "two billion, six hundred sixty-one million, five hundred eighty-six thousand, seven hundred forty-five".