66086646 has 8 divisors (see below), whose sum is σ = 132173304. Its totient is φ = 22028880.

The previous prime is 66086641. The next prime is 66086651. The reversal of 66086646 is 64668066.

It is an interprime number because it is at equal distance from previous prime (66086641) and next prime (66086651).

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

66086646 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 66086598 and 66086607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66086641) 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, 5507215 + ... + 5507226.

It is an arithmetic number, because the mean of its divisors is an integer number (16521663).

Almost surely, 2^66086646 is an apocalyptic number.

66086646 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.

66086646 is a wasteful number, since it uses less digits than its factorization.

66086646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11014446.

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 66086646 is about 8129.3693482336. The cubic root of 66086646 is about 404.3007718418.

The spelling of 66086646 in words is "sixty-six million, eighty-six thousand, six hundred forty-six".