16640773687 has 2 divisors, whose sum is σ = 16640773688. Its totient is φ = 16640773686.

The previous prime is 16640773657. The next prime is 16640773693. The reversal of 16640773687 is 78637704661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16640773687 - 2⁷ = 16640773559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16640773657) 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, 8320386843 + 8320386844.

It is an arithmetic number, because the mean of its divisors is an integer number (8320386844).

Almost surely, 2^16640773687 is an apocalyptic number.

16640773687 is a deficient number, since it is larger than the sum of its proper divisors (1).

16640773687 is an equidigital number, since it uses as much as digits as its factorization.

16640773687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7112448, while the sum is 55.

The spelling of 16640773687 in words is "sixteen billion, six hundred forty million, seven hundred seventy-three thousand, six hundred eighty-seven".