86661125 has 32 divisors (see below), whose sum is σ = 115644672. Its totient is φ = 64680000.

The previous prime is 86661103. The next prime is 86661181. The reversal of 86661125 is 52116668.

It is a happy number.

It is not a de Polignac number, because 86661125 - 2⁸ = 86660869 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123275 + ... + 123975.

It is an arithmetic number, because the mean of its divisors is an integer number (3613896).

Almost surely, 2^86661125 is an apocalyptic number.

86661125 is the 5375-th octagonal number.

It is an amenable number.

86661125 is a deficient number, since it is larger than the sum of its proper divisors (28983547).

86661125 is a wasteful number, since it uses less digits than its factorization.

86661125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782 (or 772 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 86661125 is about 9309.1957225101. The cubic root of 86661125 is about 442.5286989164.

The spelling of 86661125 in words is "eighty-six million, six hundred sixty-one thousand, one hundred twenty-five".