86606412661 has 2 divisors, whose sum is σ = 86606412662. Its totient is φ = 86606412660.

The previous prime is 86606412649. The next prime is 86606412679. The reversal of 86606412661 is 16621460668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74983416561 + 11622996100 = 273831^2 + 107810^2 .

It is a cyclic number.

It is not a de Polignac number, because 86606412661 - 2²¹ = 86604315509 is a prime.

It is a super-2 number, since 2×86606412661² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86606452661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43303206330 + 43303206331.

It is an arithmetic number, because the mean of its divisors is an integer number (43303206331).

Almost surely, 2^86606412661 is an apocalyptic number.

It is an amenable number.

86606412661 is a deficient number, since it is larger than the sum of its proper divisors (1).

86606412661 is an equidigital number, since it uses as much as digits as its factorization.

86606412661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664, while the sum is 46.

The spelling of 86606412661 in words is "eighty-six billion, six hundred six million, four hundred twelve thousand, six hundred sixty-one".