25065331665 has 16 divisors (see below), whose sum is σ = 43750397376. Its totient is φ = 12152888000.

The previous prime is 25065331661. The next prime is 25065331693. The reversal of 25065331665 is 56613356052.

It is not a de Polignac number, because 25065331665 - 2² = 25065331661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25065331661) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 75955386 + ... + 75955715.

It is an arithmetic number, because the mean of its divisors is an integer number (2734399836).

Almost surely, 2^25065331665 is an apocalyptic number.

It is an amenable number.

25065331665 is a deficient number, since it is larger than the sum of its proper divisors (18685065711).

25065331665 is a wasteful number, since it uses less digits than its factorization.

25065331665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151911120.

The product of its (nonzero) digits is 486000, while the sum is 42.

The spelling of 25065331665 in words is "twenty-five billion, sixty-five million, three hundred thirty-one thousand, six hundred sixty-five".