671886996497 has 2 divisors, whose sum is σ = 671886996498. Its totient is φ = 671886996496.

The previous prime is 671886996437. The next prime is 671886996577. The reversal of 671886996497 is 794699688176.

It is an a-pointer prime, because the next prime (671886996577) can be obtained adding 671886996497 to its sum of digits (80).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 660897457936 + 10989538561 = 812956^2 + 104831^2 .

It is a cyclic number.

It is not a de Polignac number, because 671886996497 - 2⁶ = 671886996433 is a prime.

It is not a weakly prime, because it can be changed into another prime (671886996437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335943498248 + 335943498249.

It is an arithmetic number, because the mean of its divisors is an integer number (335943498249).

Almost surely, 2^671886996497 is an apocalyptic number.

It is an amenable number.

671886996497 is a deficient number, since it is larger than the sum of its proper divisors (1).

671886996497 is an equidigital number, since it uses as much as digits as its factorization.

671886996497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1975228416, while the sum is 80.

The spelling of 671886996497 in words is "six hundred seventy-one billion, eight hundred eighty-six million, nine hundred ninety-six thousand, four hundred ninety-seven".