86646761 has 2 divisors, whose sum is σ = 86646762. Its totient is φ = 86646760.

The previous prime is 86646757. The next prime is 86646787. The reversal of 86646761 is 16764668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59969536 + 26677225 = 7744^2 + 5165^2 .

It is a cyclic number.

It is not a de Polignac number, because 86646761 - 2² = 86646757 is a prime.

It is a super-2 number, since 2×86646761² = 15015322383582242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86646701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43323380 + 43323381.

It is an arithmetic number, because the mean of its divisors is an integer number (43323381).

Almost surely, 2^86646761 is an apocalyptic number.

It is an amenable number.

86646761 is a deficient number, since it is larger than the sum of its proper divisors (1).

86646761 is an equidigital number, since it uses as much as digits as its factorization.

86646761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 44.

The square root of 86646761 is about 9308.4241953190. The cubic root of 86646761 is about 442.5042479935.

The spelling of 86646761 in words is "eighty-six million, six hundred forty-six thousand, seven hundred sixty-one".