25664611 has 16 divisors (see below), whose sum is σ = 32693760. Its totient is φ = 19612800.

The previous prime is 25664599. The next prime is 25664629. The reversal of 25664611 is 11646652.

It is a cyclic number.

It is not a de Polignac number, because 25664611 - 2¹¹ = 25662563 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (25664671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3415 + ... + 7936.

It is an arithmetic number, because the mean of its divisors is an integer number (2043360).

Almost surely, 2^25664611 is an apocalyptic number.

25664611 is a deficient number, since it is larger than the sum of its proper divisors (7029149).

25664611 is a wasteful number, since it uses less digits than its factorization.

25664611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11394.

The product of its digits is 8640, while the sum is 31.

The square root of 25664611 is about 5066.0251677227. The cubic root of 25664611 is about 294.9702584207.

The spelling of 25664611 in words is "twenty-five million, six hundred sixty-four thousand, six hundred eleven".