87169966 has 16 divisors (see below), whose sum is σ = 142799328. Its totient is φ = 39664800.

The previous prime is 87169937. The next prime is 87169981. The reversal of 87169966 is 66996178.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21765 + ... + 25456.

It is an arithmetic number, because the mean of its divisors is an integer number (8924958).

Almost surely, 2^87169966 is an apocalyptic number.

87169966 is a deficient number, since it is larger than the sum of its proper divisors (55629362).

87169966 is a wasteful number, since it uses less digits than its factorization.

87169966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47307.

The product of its digits is 979776, while the sum is 52.

The square root of 87169966 is about 9336.4857414340. The cubic root of 87169966 is about 443.3931290380.

The spelling of 87169966 in words is "eighty-seven million, one hundred sixty-nine thousand, nine hundred sixty-six".