66320218583 has 2 divisors, whose sum is σ = 66320218584. Its totient is φ = 66320218582.

The previous prime is 66320218567. The next prime is 66320218649. The reversal of 66320218583 is 38581202366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66320218583 - 2⁴ = 66320218567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66320212583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33160109291 + 33160109292.

It is an arithmetic number, because the mean of its divisors is an integer number (33160109292).

Almost surely, 2^66320218583 is an apocalyptic number.

66320218583 is a deficient number, since it is larger than the sum of its proper divisors (1).

66320218583 is an equidigital number, since it uses as much as digits as its factorization.

66320218583 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 66320218583 in words is "sixty-six billion, three hundred twenty million, two hundred eighteen thousand, five hundred eighty-three".