86704040777 has 2 divisors, whose sum is σ = 86704040778. Its totient is φ = 86704040776.

The previous prime is 86704040743. The next prime is 86704040789. The reversal of 86704040777 is 77704040768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44918139721 + 41785901056 = 211939^2 + 204416^2 .

It is a cyclic number.

It is not a de Polignac number, because 86704040777 - 2¹⁸ = 86703778633 is a prime.

It is not a weakly prime, because it can be changed into another prime (86704040377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43352020388 + 43352020389.

It is an arithmetic number, because the mean of its divisors is an integer number (43352020389).

Almost surely, 2^86704040777 is an apocalyptic number.

It is an amenable number.

86704040777 is a deficient number, since it is larger than the sum of its proper divisors (1).

86704040777 is an equidigital number, since it uses as much as digits as its factorization.

86704040777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1843968, while the sum is 50.

Subtracting from 86704040777 its reverse (77704040768), we obtain a palindrome (9000000009).

The spelling of 86704040777 in words is "eighty-six billion, seven hundred four million, forty thousand, seven hundred seventy-seven".