66888888 has 32 divisors (see below), whose sum is σ = 182424960. Its totient is φ = 20269280.

The previous prime is 66888883. The next prime is 66888889. The reversal of 66888888 is 88888866.

It is a nude number because it is divisible by every one of its digits.

66888888 is a modest number, since divided by 8888 gives 6688 as remainder.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66888883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126420 + ... + 126947.

It is an arithmetic number, because the mean of its divisors is an integer number (5700780).

Almost surely, 2^66888888 is an apocalyptic number.

It is an amenable number.

66888888 is an abundant number, since it is smaller than the sum of its proper divisors (115536072).

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

66888888 is a wasteful number, since it uses less digits than its factorization.

66888888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253387 (or 253383 counting only the distinct ones).

The product of its digits is 9437184, while the sum is 60.

The square root of 66888888 is about 8178.5627099143. The cubic root of 66888888 is about 405.9301650535.

It can be divided in two parts, 66888 and 888, that added together give a palindrome (67776).

The spelling of 66888888 in words is "sixty-six million, eight hundred eighty-eight thousand, eight hundred eighty-eight".