66506346764 has 48 divisors (see below), whose sum is σ = 136922263296. Its totient is φ = 27866203200.

The previous prime is 66506346763. The next prime is 66506346769. The reversal of 66506346764 is 46764360566.

It is not an unprimeable number, because it can be changed into a prime (66506346763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335879 + ... + 495809.

It is an arithmetic number, because the mean of its divisors is an integer number (2852547152).

Almost surely, 2^66506346764 is an apocalyptic number.

It is an amenable number.

66506346764 is an abundant number, since it is smaller than the sum of its proper divisors (70415916532).

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

66506346764 is a wasteful number, since it uses less digits than its factorization.

66506346764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160686 (or 160684 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 53.

The spelling of 66506346764 in words is "sixty-six billion, five hundred six million, three hundred forty-six thousand, seven hundred sixty-four".