66586977968567 has 8 divisors (see below), whose sum is σ = 76108642186656. Its totient is φ = 57067623448992.

The previous prime is 66586977968551. The next prime is 66586977968593. The reversal of 66586977968567 is 76586977968566.

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

It is a cyclic number.

It is not a de Polignac number, because 66586977968567 - 2⁴ = 66586977968551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66586977968567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66586977908567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 577362848 + ... + 577478165.

It is an arithmetic number, because the mean of its divisors is an integer number (9513580273332).

Almost surely, 2^{66586977968567} is an apocalyptic number.

66586977968567 is a deficient number, since it is larger than the sum of its proper divisors (9521664218089).

66586977968567 is a wasteful number, since it uses less digits than its factorization.

66586977968567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154849257.

The product of its digits is 345664972800, while the sum is 95.

Subtracting 66586977968567 from its reverse (76586977968566), we obtain a palindrome (9999999999999).

The spelling of 66586977968567 in words is "sixty-six trillion, five hundred eighty-six billion, nine hundred seventy-seven million, nine hundred sixty-eight thousand, five hundred sixty-seven".