87121838966 has 8 divisors (see below), whose sum is σ = 136364617584. Its totient is φ = 41666966440.

The previous prime is 87121838939. The next prime is 87121839011. The reversal of 87121838966 is 66983812178.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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, 946976465 + ... + 946976556.

It is an arithmetic number, because the mean of its divisors is an integer number (17045577198).

Almost surely, 2^87121838966 is an apocalyptic number.

87121838966 is a deficient number, since it is larger than the sum of its proper divisors (49242778618).

87121838966 is a wasteful number, since it uses less digits than its factorization.

87121838966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1893953046.

The product of its digits is 6967296, while the sum is 59.

The spelling of 87121838966 in words is "eighty-seven billion, one hundred twenty-one million, eight hundred thirty-eight thousand, nine hundred sixty-six".