66233856 has 160 divisors (see below), whose sum is σ = 197987328. Its totient is φ = 19537920.

The previous prime is 66233851. The next prime is 66233891. The reversal of 66233856 is 65833266.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66233851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 618955 + ... + 619061.

Almost surely, 2^66233856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66233856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98993664).

66233856 is an abundant number, since it is smaller than the sum of its proper divisors (131753472).

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

66233856 is a wasteful number, since it uses less digits than its factorization.

66233856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 156 counting only the distinct ones).

The product of its digits is 155520, while the sum is 39.

The square root of 66233856 is about 8138.4185195897. The cubic root of 66233856 is about 404.6007466111.

The spelling of 66233856 in words is "sixty-six million, two hundred thirty-three thousand, eight hundred fifty-six".