678082280917 has 2 divisors, whose sum is σ = 678082280918. Its totient is φ = 678082280916.

The previous prime is 678082280839. The next prime is 678082280947. The reversal of 678082280917 is 719082280876.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 661531715716 + 16550565201 = 813346^2 + 128649^2 .

It is a cyclic number.

It is not a de Polignac number, because 678082280917 - 2³⁵ = 643722542549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678082280947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339041140458 + 339041140459.

It is an arithmetic number, because the mean of its divisors is an integer number (339041140459).

Almost surely, 2^678082280917 is an apocalyptic number.

It is an amenable number.

678082280917 is a deficient number, since it is larger than the sum of its proper divisors (1).

678082280917 is an equidigital number, since it uses as much as digits as its factorization.

678082280917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5419008, while the sum is 58.

The spelling of 678082280917 in words is "six hundred seventy-eight billion, eighty-two million, two hundred eighty thousand, nine hundred seventeen".