66729513740 has 24 divisors (see below), whose sum is σ = 140137724160. Its totient is φ = 26690711168.

The previous prime is 66729513661. The next prime is 66729513769. The reversal of 66729513740 is 4731592766.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 582869 + ... + 687891.

It is an arithmetic number, because the mean of its divisors is an integer number (5839071840).

Almost surely, 2^66729513740 is an apocalyptic number.

It is an amenable number.

66729513740 is an abundant number, since it is smaller than the sum of its proper divisors (73408210420).

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

66729513740 is a wasteful number, since it uses less digits than its factorization.

66729513740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136801 (or 136799 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 50.

The spelling of 66729513740 in words is "sixty-six billion, seven hundred twenty-nine million, five hundred thirteen thousand, seven hundred forty".