25666670 has 8 divisors (see below), whose sum is σ = 46200024. Its totient is φ = 10266664.

The previous prime is 25666661. The next prime is 25666679. The reversal of 25666670 is 7666652.

It is an interprime number because it is at equal distance from previous prime (25666661) and next prime (25666679).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25666679) 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, 1283324 + ... + 1283343.

It is an arithmetic number, because the mean of its divisors is an integer number (5775003).

Almost surely, 2^25666670 is an apocalyptic number.

25666670 is a deficient number, since it is larger than the sum of its proper divisors (20533354).

25666670 is a wasteful number, since it uses less digits than its factorization.

25666670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2566674.

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

The square root of 25666670 is about 5066.2283801661. The cubic root of 25666670 is about 294.9781464229.

The spelling of 25666670 in words is "twenty-five million, six hundred sixty-six thousand, six hundred seventy".