66814308120 has 64 divisors (see below), whose sum is σ = 229077630720. Its totient is φ = 15271841664.

The previous prime is 66814308083. The next prime is 66814308133. The reversal of 66814308120 is 2180341866.

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, 39769582 + ... + 39771261.

It is an arithmetic number, because the mean of its divisors is an integer number (3579337980).

Almost surely, 2^66814308120 is an apocalyptic number.

66814308120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66814308120 is an abundant number, since it is smaller than the sum of its proper divisors (162263322600).

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

66814308120 is a wasteful number, since it uses less digits than its factorization.

66814308120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79540864 (or 79540860 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

Adding to 66814308120 its reverse (2180341866), we get a palindrome (68994649986).

The spelling of 66814308120 in words is "sixty-six billion, eight hundred fourteen million, three hundred eight thousand, one hundred twenty".