86661369 has 12 divisors (see below), whose sum is σ = 125260096. Its totient is φ = 57736152.

The previous prime is 86661319. The next prime is 86661391. The reversal of 86661369 is 96316668.

It is not a de Polignac number, because 86661369 - 2¹⁶ = 86595833 is a prime.

It is a super-2 number, since 2×86661369² = 15020385753908322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86661319) 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, 20604 + ... + 24450.

Almost surely, 2^86661369 is an apocalyptic number.

It is an amenable number.

86661369 is a deficient number, since it is larger than the sum of its proper divisors (38598727).

86661369 is a wasteful number, since it uses less digits than its factorization.

86661369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6356 (or 6353 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 86661369 is about 9309.2088278221. The cubic root of 86661369 is about 442.5291142388.

The spelling of 86661369 in words is "eighty-six million, six hundred sixty-one thousand, three hundred sixty-nine".