677890061789 has 2 divisors, whose sum is σ = 677890061790. Its totient is φ = 677890061788.

The previous prime is 677890061773. The next prime is 677890061803. The reversal of 677890061789 is 987160098776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 673302302500 + 4587759289 = 820550^2 + 67733^2 .

It is a cyclic number.

It is not a de Polignac number, because 677890061789 - 2⁴ = 677890061773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677890061389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338945030894 + 338945030895.

It is an arithmetic number, because the mean of its divisors is an integer number (338945030895).

Almost surely, 2^677890061789 is an apocalyptic number.

It is an amenable number.

677890061789 is a deficient number, since it is larger than the sum of its proper divisors (1).

677890061789 is an equidigital number, since it uses as much as digits as its factorization.

677890061789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64012032, while the sum is 68.

The spelling of 677890061789 in words is "six hundred seventy-seven billion, eight hundred ninety million, sixty-one thousand, seven hundred eighty-nine".