1686586061 has 2 divisors, whose sum is σ = 1686586062. Its totient is φ = 1686586060.

The previous prime is 1686586019. The next prime is 1686586073. The reversal of 1686586061 is 1606856861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1680180100 + 6405961 = 40990^2 + 2531^2 .

It is a cyclic number.

It is not a de Polignac number, because 1686586061 - 2¹⁸ = 1686323917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1686585997 and 1686586015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1686586361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 843293030 + 843293031.

It is an arithmetic number, because the mean of its divisors is an integer number (843293031).

Almost surely, 2^1686586061 is an apocalyptic number.

It is an amenable number.

1686586061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1686586061 is an equidigital number, since it uses as much as digits as its factorization.

1686586061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 47.

The square root of 1686586061 is about 41068.0661950377. The cubic root of 1686586061 is about 1190.3358186471.

The spelling of 1686586061 in words is "one billion, six hundred eighty-six million, five hundred eighty-six thousand, sixty-one".