25660667 has 8 divisors (see below), whose sum is σ = 27223776. Its totient is φ = 24103552.

The previous prime is 25660619. The next prime is 25660669. The reversal of 25660667 is 76606652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25660667 - 2⁶ = 25660603 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25660667.

It is not an unprimeable number, because it can be changed into a prime (25660669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9833 + ... + 12165.

It is an arithmetic number, because the mean of its divisors is an integer number (3402972).

Almost surely, 2^25660667 is an apocalyptic number.

25660667 is a deficient number, since it is larger than the sum of its proper divisors (1563109).

25660667 is a wasteful number, since it uses less digits than its factorization.

25660667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2997.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 25660667 is about 5065.6358929556. The cubic root of 25660667 is about 294.9551478300.

The spelling of 25660667 in words is "twenty-five million, six hundred sixty thousand, six hundred sixty-seven".