66733333320 has 128 divisors (see below), whose sum is σ = 202628874240. Its totient is φ = 17580491520.

The previous prime is 66733333309. The next prime is 66733333321. The reversal of 66733333320 is 2333333766.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (66733333321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5320897 + ... + 5333423.

It is an arithmetic number, because the mean of its divisors is an integer number (1583038080).

Almost surely, 2^66733333320 is an apocalyptic number.

66733333320 is a gapful number since it is divisible by the number (60) 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 66733333320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101314437120).

66733333320 is an abundant number, since it is smaller than the sum of its proper divisors (135895540920).

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

66733333320 is a wasteful number, since it uses less digits than its factorization.

66733333320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13075 (or 13071 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 39.

The spelling of 66733333320 in words is "sixty-six billion, seven hundred thirty-three million, three hundred thirty-three thousand, three hundred twenty".