86660518641 has 4 divisors (see below), whose sum is σ = 115547358192. Its totient is φ = 57773679092.

The previous prime is 86660518627. The next prime is 86660518661. The reversal of 86660518641 is 14681506668.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86660518641 - 2¹⁰ = 86660517617 is a prime.

It is a super-2 number, since 2×86660518641² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86660518601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14443419771 + ... + 14443419776.

It is an arithmetic number, because the mean of its divisors is an integer number (28886839548).

Almost surely, 2^86660518641 is an apocalyptic number.

It is an amenable number.

86660518641 is a deficient number, since it is larger than the sum of its proper divisors (28886839551).

86660518641 is a wasteful number, since it uses less digits than its factorization.

86660518641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28886839550.

The product of its (nonzero) digits is 1658880, while the sum is 51.

The spelling of 86660518641 in words is "eighty-six billion, six hundred sixty million, five hundred eighteen thousand, six hundred forty-one".