86665471 has 2 divisors, whose sum is σ = 86665472. Its totient is φ = 86665470.

The previous prime is 86665451. The next prime is 86665487. The reversal of 86665471 is 17456668.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86665471 is a prime.

It is a super-3 number, since 3×86665471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86665451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43332735 + 43332736.

It is an arithmetic number, because the mean of its divisors is an integer number (43332736).

Almost surely, 2^86665471 is an apocalyptic number.

86665471 is a deficient number, since it is larger than the sum of its proper divisors (1).

86665471 is an equidigital number, since it uses as much as digits as its factorization.

86665471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 43.

The square root of 86665471 is about 9309.4291446898. The cubic root of 86665471 is about 442.5360963032.

The spelling of 86665471 in words is "eighty-six million, six hundred sixty-five thousand, four hundred seventy-one".