66620512284 has 24 divisors (see below), whose sum is σ = 155818871040. Its totient is φ = 22153836144.

The previous prime is 66620512249. The next prime is 66620512313. The reversal of 66620512284 is 48221502666.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6619924 + ... + 6629979.

It is an arithmetic number, because the mean of its divisors is an integer number (6492452960).

Almost surely, 2^66620512284 is an apocalyptic number.

It is an amenable number.

66620512284 is an abundant number, since it is smaller than the sum of its proper divisors (89198358756).

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

66620512284 is a wasteful number, since it uses less digits than its factorization.

66620512284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13250329 (or 13250327 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The spelling of 66620512284 in words is "sixty-six billion, six hundred twenty million, five hundred twelve thousand, two hundred eighty-four".