66600213340 has 24 divisors (see below), whose sum is σ = 139865704272. Its totient is φ = 26639084160.

The previous prime is 66600213311. The next prime is 66600213341. The reversal of 66600213340 is 4331200666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66600213341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 724155 + ... + 810925.

It is an arithmetic number, because the mean of its divisors is an integer number (5827737678).

Almost surely, 2^66600213340 is an apocalyptic number.

It is an amenable number.

66600213340 is an abundant number, since it is smaller than the sum of its proper divisors (73265490932).

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

66600213340 is a wasteful number, since it uses less digits than its factorization.

66600213340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125157 (or 125155 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

The spelling of 66600213340 in words is "sixty-six billion, six hundred million, two hundred thirteen thousand, three hundred forty".