25540667 has 4 divisors (see below), whose sum is σ = 26134680. Its totient is φ = 24946656.

The previous prime is 25540657. The next prime is 25540673. The reversal of 25540667 is 76604552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25540667 - 2⁴ = 25540651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25540607) 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 3 ways as a sum of consecutive naturals, for example, 296942 + ... + 297027.

It is an arithmetic number, because the mean of its divisors is an integer number (6533670).

Almost surely, 2^25540667 is an apocalyptic number.

25540667 is a deficient number, since it is larger than the sum of its proper divisors (594013).

25540667 is an equidigital number, since it uses as much as digits as its factorization.

25540667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594012.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 25540667 is about 5053.7774980701. Note that the first 3 decimals coincide. The cubic root of 25540667 is about 294.4946514229.

The spelling of 25540667 in words is "twenty-five million, five hundred forty thousand, six hundred sixty-seven".