8166987 has 28 divisors (see below), whose sum is σ = 12984840. Its totient is φ = 5116608.

The previous prime is 8166967. The next prime is 8166997. The reversal of 8166987 is 7896618.

It is a happy number.

It is not a de Polignac number, because 8166987 - 2⁶ = 8166923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8166937) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 12064 + ... + 12722.

Almost surely, 2^8166987 is an apocalyptic number.

8166987 is a deficient number, since it is larger than the sum of its proper divisors (4817853).

8166987 is an equidigital number, since it uses as much as digits as its factorization.

8166987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694 (or 679 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 8166987 is about 2857.7940793556. The cubic root of 8166987 is about 201.3819868991.

The spelling of 8166987 in words is "eight million, one hundred sixty-six thousand, nine hundred eighty-seven".