86668542 has 40 divisors (see below), whose sum is σ = 195288192. Its totient is φ = 28728000.

The previous prime is 86668537. The next prime is 86668579. The reversal of 86668542 is 24586668.

It is a super-2 number, since 2×86668542² = 15022872344811528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 29542 + ... + 32342.

Almost surely, 2^86668542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86668542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97644096).

86668542 is an abundant number, since it is smaller than the sum of its proper divisors (108619650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86668542 is a wasteful number, since it uses less digits than its factorization.

86668542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3006 (or 2997 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 86668542 is about 9309.5940835248. The cubic root of 86668542 is about 442.5413233457.

The spelling of 86668542 in words is "eighty-six million, six hundred sixty-eight thousand, five hundred forty-two".