87166656259 has 4 divisors (see below), whose sum is σ = 87167854816. Its totient is φ = 87165457704.

The previous prime is 87166656253. The next prime is 87166656271. The reversal of 87166656259 is 95265666178.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87166656259 - 2¹⁵ = 87166623491 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87166656197 and 87166656206.

It is not an unprimeable number, because it can be changed into a prime (87166656253) 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, 482619 + ... + 638164.

It is an arithmetic number, because the mean of its divisors is an integer number (21791963704).

Almost surely, 2^87166656259 is an apocalyptic number.

87166656259 is a deficient number, since it is larger than the sum of its proper divisors (1198557).

87166656259 is a wasteful number, since it uses less digits than its factorization.

87166656259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198556.

The product of its digits is 32659200, while the sum is 61.

The spelling of 87166656259 in words is "eighty-seven billion, one hundred sixty-six million, six hundred fifty-six thousand, two hundred fifty-nine".