887666551 has 4 divisors (see below), whose sum is σ = 887797152. Its totient is φ = 887535952.

The previous prime is 887666537. The next prime is 887666561. The reversal of 887666551 is 155666788.

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 887666551 - 2¹⁵ = 887633783 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (887666561) 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, 54511 + ... + 68896.

It is an arithmetic number, because the mean of its divisors is an integer number (221949288).

Almost surely, 2^887666551 is an apocalyptic number.

887666551 is a deficient number, since it is larger than the sum of its proper divisors (130601).

887666551 is a wasteful number, since it uses less digits than its factorization.

887666551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130600.

The product of its digits is 2419200, while the sum is 52.

The square root of 887666551 is about 29793.7334182878. The cubic root of 887666551 is about 961.0587822901.

The spelling of 887666551 in words is "eight hundred eighty-seven million, six hundred sixty-six thousand, five hundred fifty-one".