86665401 has 6 divisors (see below), whose sum is σ = 125183370. Its totient is φ = 57776928.

The previous prime is 86665387. The next prime is 86665417. The reversal of 86665401 is 10456668.

It can be written as a sum of positive squares in only one way, i.e., 82355625 + 4309776 = 9075^2 + 2076^2 .

It is not a de Polignac number, because 86665401 - 2⁷ = 86665273 is a prime.

It is a super-3 number, since 3×86665401³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (86665451) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 4814736 + ... + 4814753.

It is an arithmetic number, because the mean of its divisors is an integer number (20863895).

Almost surely, 2^86665401 is an apocalyptic number.

It is an amenable number.

86665401 is a deficient number, since it is larger than the sum of its proper divisors (38517969).

86665401 is a wasteful number, since it uses less digits than its factorization.

86665401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9629495 (or 9629492 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 86665401 is about 9309.4253850600. The cubic root of 86665401 is about 442.5359771572.

The spelling of 86665401 in words is "eighty-six million, six hundred sixty-five thousand, four hundred one".