87065716277 has 2 divisors, whose sum is σ = 87065716278. Its totient is φ = 87065716276.

The previous prime is 87065716259. The next prime is 87065716327. The reversal of 87065716277 is 77261756078.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86993142916 + 72573361 = 294946^2 + 8519^2 .

It is a cyclic number.

It is not a de Polignac number, because 87065716277 - 2³² = 82770748981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87065716237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43532858138 + 43532858139.

It is an arithmetic number, because the mean of its divisors is an integer number (43532858139).

Almost surely, 2^87065716277 is an apocalyptic number.

It is an amenable number.

87065716277 is a deficient number, since it is larger than the sum of its proper divisors (1).

87065716277 is an equidigital number, since it uses as much as digits as its factorization.

87065716277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6914880, while the sum is 56.

The spelling of 87065716277 in words is "eighty-seven billion, sixty-five million, seven hundred sixteen thousand, two hundred seventy-seven".