66814289340 has 48 divisors (see below), whose sum is σ = 187256512800. Its totient is φ = 17800334080.

The previous prime is 66814289299. The next prime is 66814289341. The reversal of 66814289340 is 4398241866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66814289341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 461115 + ... + 588434.

It is an arithmetic number, because the mean of its divisors is an integer number (3901177350).

Almost surely, 2^66814289340 is an apocalyptic number.

66814289340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66814289340 is an abundant number, since it is smaller than the sum of its proper divisors (120442223460).

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

66814289340 is a wasteful number, since it uses less digits than its factorization.

66814289340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050622 (or 1050620 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 51.

The spelling of 66814289340 in words is "sixty-six billion, eight hundred fourteen million, two hundred eighty-nine thousand, three hundred forty".