2665887428 has 12 divisors (see below), whose sum is σ = 4670950032. Its totient is φ = 1331330280.

The previous prime is 2665887403. The next prime is 2665887443. The reversal of 2665887428 is 8247885662.

It is a happy number.

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 3 ways as a sum of consecutive naturals, for example, 399638 + ... + 406253.

It is an arithmetic number, because the mean of its divisors is an integer number (389245836).

Almost surely, 2^2665887428 is an apocalyptic number.

It is an amenable number.

2665887428 is a deficient number, since it is larger than the sum of its proper divisors (2005062604).

2665887428 is a wasteful number, since it uses less digits than its factorization.

2665887428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806722 (or 806720 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 56.

The square root of 2665887428 is about 51632.2324522192. The cubic root of 2665887428 is about 1386.5874620636.

The spelling of 2665887428 in words is "two billion, six hundred sixty-five million, eight hundred eighty-seven thousand, four hundred twenty-eight".