2665899825 has 48 divisors (see below), whose sum is σ = 4481754816. Its totient is φ = 1398067200.

The previous prime is 2665899809. The next prime is 2665899877. The reversal of 2665899825 is 5289985662.

It is not a de Polignac number, because 2665899825 - 2⁴ = 2665899809 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1499337 + ... + 1501113.

It is an arithmetic number, because the mean of its divisors is an integer number (93369892).

Almost surely, 2^2665899825 is an apocalyptic number.

2665899825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2665899825 is a deficient number, since it is larger than the sum of its proper divisors (1815854991).

2665899825 is a wasteful number, since it uses less digits than its factorization.

2665899825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114 (or 2109 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 60.

The square root of 2665899825 is about 51632.3525030576. The cubic root of 2665899825 is about 1386.5896113789.

The spelling of 2665899825 in words is "two billion, six hundred sixty-five million, eight hundred ninety-nine thousand, eight hundred twenty-five".