987666658 has 32 divisors (see below), whose sum is σ = 1654266240. Its totient is φ = 438480000.

The previous prime is 987666649. The next prime is 987666703. The reversal of 987666658 is 856666789.

It is a junction number, because it is equal to n+sod(n) for n = 987666596 and 987666605.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 167358 + ... + 173158.

It is an arithmetic number, because the mean of its divisors is an integer number (51695820).

Almost surely, 2^987666658 is an apocalyptic number.

987666658 is a deficient number, since it is larger than the sum of its proper divisors (666599582).

987666658 is a wasteful number, since it uses less digits than its factorization.

987666658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5994.

The product of its digits is 26127360, while the sum is 61.

The square root of 987666658 is about 31427.1643327870. The cubic root of 987666658 is about 995.8718679758.

The spelling of 987666658 in words is "nine hundred eighty-seven million, six hundred sixty-six thousand, six hundred fifty-eight".