16442640667 has 2 divisors, whose sum is σ = 16442640668. Its totient is φ = 16442640666.

The previous prime is 16442640647. The next prime is 16442640727. The reversal of 16442640667 is 76604624461.

16442640667 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 not a de Polignac number, because 16442640667 - 2¹⁵ = 16442607899 is a prime.

It is a super-3 number, since 3×16442640667³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (16442640647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8221320333 + 8221320334.

It is an arithmetic number, because the mean of its divisors is an integer number (8221320334).

Almost surely, 2^16442640667 is an apocalyptic number.

16442640667 is a deficient number, since it is larger than the sum of its proper divisors (1).

16442640667 is an equidigital number, since it uses as much as digits as its factorization.

16442640667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 46.

The spelling of 16442640667 in words is "sixteen billion, four hundred forty-two million, six hundred forty thousand, six hundred sixty-seven".