2666402265 has 16 divisors (see below), whose sum is σ = 4365459648. Its totient is φ = 1389009216.

The previous prime is 2666402209. The next prime is 2666402269. The reversal of 2666402265 is 5622046662.

It is not a de Polignac number, because 2666402265 - 2¹² = 2666398169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2666402269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2066334 + ... + 2067623.

It is an arithmetic number, because the mean of its divisors is an integer number (272841228).

Almost surely, 2^2666402265 is an apocalyptic number.

It is an amenable number.

2666402265 is a deficient number, since it is larger than the sum of its proper divisors (1699057383).

2666402265 is a wasteful number, since it uses less digits than its factorization.

2666402265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4134008.

The product of its (nonzero) digits is 207360, while the sum is 39.

The square root of 2666402265 is about 51637.2178278420. The cubic root of 2666402265 is about 1386.6767157173.

The spelling of 2666402265 in words is "two billion, six hundred sixty-six million, four hundred two thousand, two hundred sixty-five".