66729237912 has 160 divisors (see below), whose sum is σ = 188424878400. Its totient is φ = 22062813696.

The previous prime is 66729237889. The next prime is 66729237917. The reversal of 66729237912 is 21973292766.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66729237917) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 59104164 + ... + 59105292.

It is an arithmetic number, because the mean of its divisors is an integer number (1177655490).

Almost surely, 2^66729237912 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 66729237912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94212439200).

66729237912 is an abundant number, since it is smaller than the sum of its proper divisors (121695640488).

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

66729237912 is a wasteful number, since it uses less digits than its factorization.

66729237912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807 (or 1794 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 54.

The spelling of 66729237912 in words is "sixty-six billion, seven hundred twenty-nine million, two hundred thirty-seven thousand, nine hundred twelve".