66607188563 has 2 divisors, whose sum is σ = 66607188564. Its totient is φ = 66607188562.

The previous prime is 66607188547. The next prime is 66607188601. The reversal of 66607188563 is 36588170666.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66607188563 - 2⁴ = 66607188547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66607188499 and 66607188508.

It is not a weakly prime, because it can be changed into another prime (66607188463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33303594281 + 33303594282.

It is an arithmetic number, because the mean of its divisors is an integer number (33303594282).

Almost surely, 2^66607188563 is an apocalyptic number.

66607188563 is a deficient number, since it is larger than the sum of its proper divisors (1).

66607188563 is an equidigital number, since it uses as much as digits as its factorization.

66607188563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 66607188563 in words is "sixty-six billion, six hundred seven million, one hundred eighty-eight thousand, five hundred sixty-three".