25667990 has 16 divisors (see below), whose sum is σ = 47277648. Its totient is φ = 10028256.

The previous prime is 25667989. The next prime is 25668001. The reversal of 25667990 is 9976652.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 29417 + ... + 30276.

It is an arithmetic number, because the mean of its divisors is an integer number (2954853).

Almost surely, 2^25667990 is an apocalyptic number.

25667990 is a deficient number, since it is larger than the sum of its proper divisors (21609658).

25667990 is a wasteful number, since it uses less digits than its factorization.

25667990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59743.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 25667990 is about 5066.3586529183. The cubic root of 25667990 is about 294.9832031038.

The spelling of 25667990 in words is "twenty-five million, six hundred sixty-seven thousand, nine hundred ninety".