28800366665 has 24 divisors (see below), whose sum is σ = 41950923840. Its totient is φ = 18890174688.

The previous prime is 28800366653. The next prime is 28800366691. The reversal of 28800366665 is 56666300882.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-28800366665 is a prime.

It is a super-2 number, since 2×28800366665² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2549855 + ... + 2561124.

It is an arithmetic number, because the mean of its divisors is an integer number (1747955160).

Almost surely, 2^28800366665 is an apocalyptic number.

It is an amenable number.

28800366665 is a deficient number, since it is larger than the sum of its proper divisors (13150557175).

28800366665 is a wasteful number, since it uses less digits than its factorization.

28800366665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5111021 (or 5111014 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 50.

The spelling of 28800366665 in words is "twenty-eight billion, eight hundred million, three hundred sixty-six thousand, six hundred sixty-five".