25766091 has 24 divisors (see below), whose sum is σ = 40325376. Its totient is φ = 15759360.

The previous prime is 25766063. The next prime is 25766093. The reversal of 25766091 is 19066752.

It is not a de Polignac number, because 25766091 - 2⁷ = 25765963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25766093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21771 + ... + 22923.

It is an arithmetic number, because the mean of its divisors is an integer number (1680224).

Almost surely, 2^25766091 is an apocalyptic number.

25766091 is a deficient number, since it is larger than the sum of its proper divisors (14559285).

25766091 is a wasteful number, since it uses less digits than its factorization.

25766091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363 (or 1360 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 25766091 is about 5076.0310282740. The cubic root of 25766091 is about 295.3585260756.

The spelling of 25766091 in words is "twenty-five million, seven hundred sixty-six thousand, ninety-one".