86665542 has 8 divisors (see below), whose sum is σ = 173331096. Its totient is φ = 28888512.

The previous prime is 86665519. The next prime is 86665549. The reversal of 86665542 is 24556668.

It is a sphenic number, since it is the product of 3 distinct primes.

86665542 is an admirable number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 86665494 and 86665503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86665549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7222123 + ... + 7222134.

It is an arithmetic number, because the mean of its divisors is an integer number (21666387).

Almost surely, 2^86665542 is an apocalyptic number.

86665542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

86665542 is a wasteful number, since it uses less digits than its factorization.

86665542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14444262.

The product of its digits is 345600, while the sum is 42.

The square root of 86665542 is about 9309.4329580270. The cubic root of 86665542 is about 442.5362171512.

The spelling of 86665542 in words is "eighty-six million, six hundred sixty-five thousand, five hundred forty-two".