642066202031 has 2 divisors, whose sum is σ = 642066202032. Its totient is φ = 642066202030.

The previous prime is 642066201991. The next prime is 642066202033. The reversal of 642066202031 is 130202660246.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-642066202031 is a prime.

It is a super-2 number, since 2×642066202031² (a number of 24 digits) contains 22 as substring.

Together with 642066202033, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642066202033) 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, 321033101015 + 321033101016.

It is an arithmetic number, because the mean of its divisors is an integer number (321033101016).

Almost surely, 2^642066202031 is an apocalyptic number.

642066202031 is a deficient number, since it is larger than the sum of its proper divisors (1).

642066202031 is an equidigital number, since it uses as much as digits as its factorization.

642066202031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 642066202031 its reverse (130202660246), we get a palindrome (772268862277).

The spelling of 642066202031 in words is "six hundred forty-two billion, sixty-six million, two hundred two thousand, thirty-one".