86661942349 has 4 divisors (see below), whose sum is σ = 86688151264. Its totient is φ = 86635733436.

The previous prime is 86661942313. The next prime is 86661942361. The reversal of 86661942349 is 94324916668.

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 86661942349 - 2⁹ = 86661941837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86661942293 and 86661942302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86661943349) 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 in 3 ways as a sum of consecutive naturals, for example, 13099497 + ... + 13106110.

It is an arithmetic number, because the mean of its divisors is an integer number (21672037816).

Almost surely, 2^86661942349 is an apocalyptic number.

It is an amenable number.

86661942349 is a deficient number, since it is larger than the sum of its proper divisors (26208915).

86661942349 is a wasteful number, since it uses less digits than its factorization.

86661942349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26208914.

The product of its digits is 13436928, while the sum is 58.

The spelling of 86661942349 in words is "eighty-six billion, six hundred sixty-one million, nine hundred forty-two thousand, three hundred forty-nine".