65678888 has 64 divisors (see below), whose sum is σ = 145696320. Its totient is φ = 27417600.

The previous prime is 65678867. The next prime is 65678891. The reversal of 65678888 is 88887656.

65678888 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63818 + ... + 64838.

It is an arithmetic number, because the mean of its divisors is an integer number (2276505).

Almost surely, 2^65678888 is an apocalyptic number.

65678888 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65678888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72848160).

65678888 is an abundant number, since it is smaller than the sum of its proper divisors (80017432).

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

65678888 is a wasteful number, since it uses less digits than its factorization.

65678888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098 (or 1094 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 56.

The square root of 65678888 is about 8104.2512300644. The cubic root of 65678888 is about 403.4675369418.

It can be divided in two parts, 65678 and 888, that added together give a palindrome (66566).

The spelling of 65678888 in words is "sixty-five million, six hundred seventy-eight thousand, eight hundred eighty-eight".