25660087 has 2 divisors, whose sum is σ = 25660088. Its totient is φ = 25660086.

The previous prime is 25660079. The next prime is 25660091. The reversal of 25660087 is 78006652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25660087 - 2³ = 25660079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25660007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12830043 + 12830044.

It is an arithmetic number, because the mean of its divisors is an integer number (12830044).

Almost surely, 2^25660087 is an apocalyptic number.

25660087 is a deficient number, since it is larger than the sum of its proper divisors (1).

25660087 is an equidigital number, since it uses as much as digits as its factorization.

25660087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 25660087 is about 5065.5786441432. The cubic root of 25660087 is about 294.9529255537.

The spelling of 25660087 in words is "twenty-five million, six hundred sixty thousand, eighty-seven".