66534717396 has 48 divisors (see below), whose sum is σ = 177595286400. Its totient is φ = 18991772160.

The previous prime is 66534717341. The next prime is 66534717397. The reversal of 66534717396 is 69371743566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66534717397) 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, 289425 + ... + 465656.

It is an arithmetic number, because the mean of its divisors is an integer number (3699901800).

Almost surely, 2^66534717396 is an apocalyptic number.

It is an amenable number.

66534717396 is an abundant number, since it is smaller than the sum of its proper divisors (111060569004).

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

66534717396 is a wasteful number, since it uses less digits than its factorization.

66534717396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756144 (or 756142 counting only the distinct ones).

The product of its digits is 17146080, while the sum is 57.

The spelling of 66534717396 in words is "sixty-six billion, five hundred thirty-four million, seven hundred seventeen thousand, three hundred ninety-six".