25665332040 has 96 divisors (see below), whose sum is σ = 83464318080. Its totient is φ = 6839822976.

The previous prime is 25665332029. The next prime is 25665332053. The reversal of 25665332040 is 4023356652.

25665332040 is a `hidden beast` number, since 2 + 5 + 66 + 533 + 20 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 25665331986 and 25665332004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 578737 + ... + 621503.

It is an arithmetic number, because the mean of its divisors is an integer number (869419980).

Almost surely, 2^25665332040 is an apocalyptic number.

25665332040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25665332040 is an abundant number, since it is smaller than the sum of its proper divisors (57798986040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25665332040 is a wasteful number, since it uses less digits than its factorization.

25665332040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44451 (or 44444 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

Adding to 25665332040 its reverse (4023356652), we get a palindrome (29688688692).

The spelling of 25665332040 in words is "twenty-five billion, six hundred sixty-five million, three hundred thirty-two thousand, forty".