66347250565506 has 8 divisors (see below), whose sum is σ = 132694501131024. Its totient is φ = 22115750188500.

The previous prime is 66347250565489. The next prime is 66347250565517. The reversal of 66347250565506 is 60556505274366.

It is a sphenic number, since it is the product of 3 distinct primes.

66347250565506 is an admirable number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66347250565506.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5528937547120 + ... + 5528937547131.

It is an arithmetic number, because the mean of its divisors is an integer number (16586812641378).

Almost surely, 2^{66347250565506} is an apocalyptic number.

66347250565506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66347250565506 is a wasteful number, since it uses less digits than its factorization.

66347250565506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11057875094256.

The product of its (nonzero) digits is 136080000, while the sum is 60.

The spelling of 66347250565506 in words is "sixty-six trillion, three hundred forty-seven billion, two hundred fifty million, five hundred sixty-five thousand, five hundred six".