86666025 has 24 divisors (see below), whose sum is σ = 147165184. Its totient is φ = 44971200.

The previous prime is 86665993. The next prime is 86666039. The reversal of 86666025 is 52066668.

It is not a de Polignac number, because 86666025 - 2⁵ = 86665993 is a prime.

It is a Duffinian 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 23 ways as a sum of consecutive naturals, for example, 12841 + ... + 18390.

Almost surely, 2^86666025 is an apocalyptic number.

It is an amenable number.

86666025 is a deficient number, since it is larger than the sum of its proper divisors (60499159).

86666025 is a wasteful number, since it uses less digits than its factorization.

86666025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31281 (or 31276 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 86666025 is about 9309.4588994205. The cubic root of 86666025 is about 442.5370392565.

The spelling of 86666025 in words is "eighty-six million, six hundred sixty-six thousand, twenty-five".