66582618 has 8 divisors (see below), whose sum is σ = 133165248. Its totient is φ = 22194204.

The previous prime is 66582617. The next prime is 66582629. The reversal of 66582618 is 81628566.

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

66582618 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 66582618.

It is not an unprimeable number, because it can be changed into a prime (66582617) 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, 5548546 + ... + 5548557.

It is an arithmetic number, because the mean of its divisors is an integer number (16645656).

Almost surely, 2^66582618 is an apocalyptic number.

66582618 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.

66582618 is a wasteful number, since it uses less digits than its factorization.

66582618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11097108.

The product of its digits is 138240, while the sum is 42.

The square root of 66582618 is about 8159.8172773660. The cubic root of 66582618 is about 405.3096610557.

The spelling of 66582618 in words is "sixty-six million, five hundred eighty-two thousand, six hundred eighteen".