66323868 has 96 divisors (see below), whose sum is σ = 179081280. Its totient is φ = 18923520.

The previous prime is 66323861. The next prime is 66323879. The reversal of 66323868 is 86832366.

66323868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66323861) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 235888 + ... + 236168.

It is an arithmetic number, because the mean of its divisors is an integer number (1865430).

Almost surely, 2^66323868 is an apocalyptic number.

66323868 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 66323868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89540640).

66323868 is an abundant number, since it is smaller than the sum of its proper divisors (112757412).

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

66323868 is a wasteful number, since it uses less digits than its factorization.

66323868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 405 counting only the distinct ones).

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

The square root of 66323868 is about 8143.9467090594. The cubic root of 66323868 is about 404.7839481702.

It can be divided in two parts, 663 and 23868, that multiplied together give a square (15824484 = 3978²).

The spelling of 66323868 in words is "sixty-six million, three hundred twenty-three thousand, eight hundred sixty-eight".