642206460067 has 2 divisors, whose sum is σ = 642206460068. Its totient is φ = 642206460066.

The previous prime is 642206460043. The next prime is 642206460107. The reversal of 642206460067 is 760064602246.

642206460067 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-642206460067 is a prime.

It is not a weakly prime, because it can be changed into another prime (642206460367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321103230033 + 321103230034.

It is an arithmetic number, because the mean of its divisors is an integer number (321103230034).

Almost surely, 2^642206460067 is an apocalyptic number.

642206460067 is a deficient number, since it is larger than the sum of its proper divisors (1).

642206460067 is an equidigital number, since it uses as much as digits as its factorization.

642206460067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 43.

The spelling of 642206460067 in words is "six hundred forty-two billion, two hundred six million, four hundred sixty thousand, sixty-seven".