66733733700 has 108 divisors (see below), whose sum is σ = 209392223040. Its totient is φ = 17777027520.

The previous prime is 66733733683. The next prime is 66733733761. The reversal of 66733733700 is 733733766.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 831961 + ... + 908639.

It is an arithmetic number, because the mean of its divisors is an integer number (1938816880).

Almost surely, 2^66733733700 is an apocalyptic number.

66733733700 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 66733733700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104696111520).

66733733700 is an abundant number, since it is smaller than the sum of its proper divisors (142658489340).

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

66733733700 is a wasteful number, since it uses less digits than its factorization.

66733733700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77666 (or 77656 counting only the distinct ones).

The product of its (nonzero) digits is 1000188, while the sum is 45.

The spelling of 66733733700 in words is "sixty-six billion, seven hundred thirty-three million, seven hundred thirty-three thousand, seven hundred".