2666238845 has 4 divisors (see below), whose sum is σ = 3199486620. Its totient is φ = 2132991072.

The previous prime is 2666238823. The next prime is 2666238853. The reversal of 2666238845 is 5488326662.

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 599809081 + 2066429764 = 24491^2 + 45458^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2666238845 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2666238793 and 2666238802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266623880 + ... + 266623889.

It is an arithmetic number, because the mean of its divisors is an integer number (799871655).

Almost surely, 2^2666238845 is an apocalyptic number.

It is an amenable number.

2666238845 is a deficient number, since it is larger than the sum of its proper divisors (533247775).

2666238845 is an equidigital number, since it uses as much as digits as its factorization.

2666238845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533247774.

The product of its digits is 3317760, while the sum is 50.

The square root of 2666238845 is about 51635.6354178004. The cubic root of 2666238845 is about 1386.6483859911.

The spelling of 2666238845 in words is "two billion, six hundred sixty-six million, two hundred thirty-eight thousand, eight hundred forty-five".