86666481 has 12 divisors (see below), whose sum is σ = 136565520. Its totient is φ = 52525080.

The previous prime is 86666479. The next prime is 86666519. The reversal of 86666481 is 18466668.

It is not a de Polignac number, because 86666481 - 2¹ = 86666479 is a prime.

It is a super-2 number, since 2×86666481² = 15022157857846722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86666401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 437611 + ... + 437808.

It is an arithmetic number, because the mean of its divisors is an integer number (11380460).

Almost surely, 2^86666481 is an apocalyptic number.

It is an amenable number.

86666481 is a deficient number, since it is larger than the sum of its proper divisors (49899039).

86666481 is a wasteful number, since it uses less digits than its factorization.

86666481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875436 (or 875433 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 86666481 is about 9309.4833906077. The cubic root of 86666481 is about 442.5378154028.

The spelling of 86666481 in words is "eighty-six million, six hundred sixty-six thousand, four hundred eighty-one".