66421086 has 8 divisors (see below), whose sum is σ = 132842184. Its totient is φ = 22140360.

The previous prime is 66421073. The next prime is 66421099. The reversal of 66421086 is 68012466.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66421073) and next prime (66421099).

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

66421086 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5535085 + ... + 5535096.

It is an arithmetic number, because the mean of its divisors is an integer number (16605273).

Almost surely, 2^66421086 is an apocalyptic number.

66421086 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.

66421086 is a wasteful number, since it uses less digits than its factorization.

66421086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11070186.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 66421086 is about 8149.9132510721. The cubic root of 66421086 is about 404.9816300157.

The spelling of 66421086 in words is "sixty-six million, four hundred twenty-one thousand, eighty-six".