66665580283607 has 2 divisors, whose sum is σ = 66665580283608. Its totient is φ = 66665580283606.

The previous prime is 66665580283559. The next prime is 66665580283657. The reversal of 66665580283607 is 70638208556666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66665580283607 - 2⁶ = 66665580283543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66665580283657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33332790141803 + 33332790141804.

It is an arithmetic number, because the mean of its divisors is an integer number (33332790141804).

Almost surely, 2^{66665580283607} is an apocalyptic number.

66665580283607 is a deficient number, since it is larger than the sum of its proper divisors (1).

66665580283607 is an equidigital number, since it uses as much as digits as its factorization.

66665580283607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 522547200, while the sum is 68.

The spelling of 66665580283607 in words is "sixty-six trillion, six hundred sixty-five billion, five hundred eighty million, two hundred eighty-three thousand, six hundred seven".