1686065886977 has 2 divisors, whose sum is σ = 1686065886978. Its totient is φ = 1686065886976.

The previous prime is 1686065886917. The next prime is 1686065887013. The reversal of 1686065886977 is 7796885606861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1517821536001 + 168244350976 = 1231999^2 + 410176^2 .

It is a cyclic number.

It is not a de Polignac number, because 1686065886977 - 2¹⁸ = 1686065624833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1686065886898 and 1686065886907.

It is not a weakly prime, because it can be changed into another prime (1686065886907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 843032943488 + 843032943489.

It is an arithmetic number, because the mean of its divisors is an integer number (843032943489).

Almost surely, 2^{1686065886977} is an apocalyptic number.

It is an amenable number.

1686065886977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1686065886977 is an equidigital number, since it uses as much as digits as its factorization.

1686065886977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1463132160, while the sum is 77.

The spelling of 1686065886977 in words is "one trillion, six hundred eighty-six billion, sixty-five million, eight hundred eighty-six thousand, nine hundred seventy-seven".