66923568573667 has 8 divisors (see below), whose sum is σ = 72071729963856. Its totient is φ = 61775434980192.

The previous prime is 66923568573643. The next prime is 66923568573671. The reversal of 66923568573667 is 76637586532966.

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 66923568573667 - 2⁷ = 66923568573539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66923568513667) 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, 1807873 + ... + 11709634.

It is an arithmetic number, because the mean of its divisors is an integer number (9008966245482).

Almost surely, 2^{66923568573667} is an apocalyptic number.

66923568573667 is a deficient number, since it is larger than the sum of its proper divisors (5148161390189).

66923568573667 is a wasteful number, since it uses less digits than its factorization.

66923568573667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13898357.

The product of its digits is 12345177600, while the sum is 79.

The spelling of 66923568573667 in words is "sixty-six trillion, nine hundred twenty-three billion, five hundred sixty-eight million, five hundred seventy-three thousand, six hundred sixty-seven".