7898166985937 has 2 divisors, whose sum is σ = 7898166985938. Its totient is φ = 7898166985936.

The previous prime is 7898166985931. The next prime is 7898166985939. The reversal of 7898166985937 is 7395896618987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7101153710401 + 797013275536 = 2664799^2 + 892756^2 .

It is a cyclic number.

It is not a de Polignac number, because 7898166985937 - 2³⁰ = 7897093244113 is a prime.

Together with 7898166985939, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7898166985931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3949083492968 + 3949083492969.

It is an arithmetic number, because the mean of its divisors is an integer number (3949083492969).

Almost surely, 2^{7898166985937} is an apocalyptic number.

It is an amenable number.

7898166985937 is a deficient number, since it is larger than the sum of its proper divisors (1).

7898166985937 is an equidigital number, since it uses as much as digits as its factorization.

7898166985937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9876142080, while the sum is 86.

The spelling of 7898166985937 in words is "seven trillion, eight hundred ninety-eight billion, one hundred sixty-six million, nine hundred eighty-five thousand, nine hundred thirty-seven".