86387661 has 24 divisors (see below), whose sum is σ = 135087360. Its totient is φ = 54554472.

The previous prime is 86387657. The next prime is 86387671. The reversal of 86387661 is 16678368.

86387661 is a `hidden beast` number, since 8 + 638 + 7 + 6 + 6 + 1 = 666.

It is not a de Polignac number, because 86387661 - 2² = 86387657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86387611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5316 + ... + 14178.

It is an arithmetic number, because the mean of its divisors is an integer number (5628640).

Almost surely, 2^86387661 is an apocalyptic number.

It is an amenable number.

86387661 is a deficient number, since it is larger than the sum of its proper divisors (48699699).

86387661 is a wasteful number, since it uses less digits than its factorization.

86387661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8910 (or 8885 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 86387661 is about 9294.4962746778. The cubic root of 86387661 is about 442.0627338050.

The spelling of 86387661 in words is "eighty-six million, three hundred eighty-seven thousand, six hundred sixty-one".