16640570677 has 2 divisors, whose sum is σ = 16640570678. Its totient is φ = 16640570676.

The previous prime is 16640570659. The next prime is 16640570719. The reversal of 16640570677 is 77607504661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10254802756 + 6385767921 = 101266^2 + 79911^2 .

It is a cyclic number.

It is not a de Polignac number, because 16640570677 - 2⁷ = 16640570549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16640570677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16640574677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8320285338 + 8320285339.

It is an arithmetic number, because the mean of its divisors is an integer number (8320285339).

Almost surely, 2^16640570677 is an apocalyptic number.

It is an amenable number.

16640570677 is a deficient number, since it is larger than the sum of its proper divisors (1).

16640570677 is an equidigital number, since it uses as much as digits as its factorization.

16640570677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1481760, while the sum is 49.

The spelling of 16640570677 in words is "sixteen billion, six hundred forty million, five hundred seventy thousand, six hundred seventy-seven".