66201623783 has 2 divisors, whose sum is σ = 66201623784. Its totient is φ = 66201623782.

The previous prime is 66201623767. The next prime is 66201623869. The reversal of 66201623783 is 38732610266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66201623783 - 2⁴ = 66201623767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66201620783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33100811891 + 33100811892.

It is an arithmetic number, because the mean of its divisors is an integer number (33100811892).

Almost surely, 2^66201623783 is an apocalyptic number.

66201623783 is a deficient number, since it is larger than the sum of its proper divisors (1).

66201623783 is an equidigital number, since it uses as much as digits as its factorization.

66201623783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 66201623783 in words is "sixty-six billion, two hundred one million, six hundred twenty-three thousand, seven hundred eighty-three".