87664156787 has 2 divisors, whose sum is σ = 87664156788. Its totient is φ = 87664156786.

The previous prime is 87664156763. The next prime is 87664156831. The reversal of 87664156787 is 78765146678.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87664156787 - 2¹⁰ = 87664155763 is a prime.

It is not a weakly prime, because it can be changed into another prime (87664156747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43832078393 + 43832078394.

It is an arithmetic number, because the mean of its divisors is an integer number (43832078394).

Almost surely, 2^87664156787 is an apocalyptic number.

87664156787 is a deficient number, since it is larger than the sum of its proper divisors (1).

87664156787 is an equidigital number, since it uses as much as digits as its factorization.

87664156787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94832640, while the sum is 65.

The spelling of 87664156787 in words is "eighty-seven billion, six hundred sixty-four million, one hundred fifty-six thousand, seven hundred eighty-seven".