66654300766663 has 2 divisors, whose sum is σ = 66654300766664. Its totient is φ = 66654300766662.

The previous prime is 66654300766649. The next prime is 66654300766723. The reversal of 66654300766663 is 36666700345666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66654300766663 - 2⁴¹ = 64455277511111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66654300766595 and 66654300766604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66654300766363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33327150383331 + 33327150383332.

It is an arithmetic number, because the mean of its divisors is an integer number (33327150383332).

Almost surely, 2^{66654300766663} is an apocalyptic number.

66654300766663 is a deficient number, since it is larger than the sum of its proper divisors (1).

66654300766663 is an equidigital number, since it uses as much as digits as its factorization.

66654300766663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 352719360, while the sum is 64.

The spelling of 66654300766663 in words is "sixty-six trillion, six hundred fifty-four billion, three hundred million, seven hundred sixty-six thousand, six hundred sixty-three".