66515761258332 has 12 divisors (see below), whose sum is σ = 155203442936136. Its totient is φ = 22171920419440.

The previous prime is 66515761258313. The next prime is 66515761258333. The reversal of 66515761258332 is 23385216751566.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66515761258333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2771490052419 + ... + 2771490052442.

It is an arithmetic number, because the mean of its divisors is an integer number (12933620244678).

Almost surely, 2^{66515761258332} is an apocalyptic number.

It is an amenable number.

66515761258332 is an abundant number, since it is smaller than the sum of its proper divisors (88687681677804).

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

66515761258332 is a wasteful number, since it uses less digits than its factorization.

66515761258332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5542980104868 (or 5542980104866 counting only the distinct ones).

The product of its digits is 54432000, while the sum is 60.

The spelling of 66515761258332 in words is "sixty-six trillion, five hundred fifteen billion, seven hundred sixty-one million, two hundred fifty-eight thousand, three hundred thirty-two".