66783733140 has 48 divisors (see below), whose sum is σ = 191555300160. Its totient is φ = 17374629120.

The previous prime is 66783733127. The next prime is 66783733183. The reversal of 66783733140 is 4133738766.

It is a super-2 number, since 2×66783733140² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66783733140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13571470 + ... + 13576389.

It is an arithmetic number, because the mean of its divisors is an integer number (3990735420).

Almost surely, 2^66783733140 is an apocalyptic number.

66783733140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66783733140 is an abundant number, since it is smaller than the sum of its proper divisors (124771567020).

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

66783733140 is a wasteful number, since it uses less digits than its factorization.

66783733140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27147912 (or 27147910 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 48.

The spelling of 66783733140 in words is "sixty-six billion, seven hundred eighty-three million, seven hundred thirty-three thousand, one hundred forty".