66658841783 has 2 divisors, whose sum is σ = 66658841784. Its totient is φ = 66658841782.

The previous prime is 66658841759. The next prime is 66658841791. The reversal of 66658841783 is 38714885666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66658841783 - 2⁶ = 66658841719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66648841783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33329420891 + 33329420892.

It is an arithmetic number, because the mean of its divisors is an integer number (33329420892).

Almost surely, 2^66658841783 is an apocalyptic number.

66658841783 is a deficient number, since it is larger than the sum of its proper divisors (1).

66658841783 is an equidigital number, since it uses as much as digits as its factorization.

66658841783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46448640, while the sum is 62.

The spelling of 66658841783 in words is "sixty-six billion, six hundred fifty-eight million, eight hundred forty-one thousand, seven hundred eighty-three".