66683778350 has 24 divisors (see below), whose sum is σ = 141750661008. Its totient is φ = 22863009600.

The previous prime is 66683778319. The next prime is 66683778361. The reversal of 66683778350 is 5387738666.

It is a self number, because there is not a number n which added to its sum of digits gives 66683778350.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95262191 + ... + 95262890.

It is an arithmetic number, because the mean of its divisors is an integer number (5906277542).

Almost surely, 2^66683778350 is an apocalyptic number.

66683778350 is an abundant number, since it is smaller than the sum of its proper divisors (75066882658).

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

66683778350 is a wasteful number, since it uses less digits than its factorization.

66683778350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190525100 (or 190525095 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 59.

The spelling of 66683778350 in words is "sixty-six billion, six hundred eighty-three million, seven hundred seventy-eight thousand, three hundred fifty".