86661939503 has 2 divisors, whose sum is σ = 86661939504. Its totient is φ = 86661939502.

The previous prime is 86661939409. The next prime is 86661939523. The reversal of 86661939503 is 30593916668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86661939503 - 2¹² = 86661935407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86661939523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43330969751 + 43330969752.

It is an arithmetic number, because the mean of its divisors is an integer number (43330969752).

Almost surely, 2^86661939503 is an apocalyptic number.

86661939503 is a deficient number, since it is larger than the sum of its proper divisors (1).

86661939503 is an equidigital number, since it uses as much as digits as its factorization.

86661939503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6298560, while the sum is 56.

The spelling of 86661939503 in words is "eighty-six billion, six hundred sixty-one million, nine hundred thirty-nine thousand, five hundred three".