87789966 has 32 divisors (see below), whose sum is σ = 194410368. Its totient is φ = 26204640.

The previous prime is 87789953. The next prime is 87789991. The reversal of 87789966 is 66998778.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5505 + ... + 14348.

It is an arithmetic number, because the mean of its divisors is an integer number (6075324).

Almost surely, 2^87789966 is an apocalyptic number.

87789966 is an abundant number, since it is smaller than the sum of its proper divisors (106620402).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87789966 is a wasteful number, since it uses less digits than its factorization.

87789966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19936.

The product of its digits is 9144576, while the sum is 60.

The square root of 87789966 is about 9369.6299820217. The cubic root of 87789966 is about 444.4418639063.

The spelling of 87789966 in words is "eighty-seven million, seven hundred eighty-nine thousand, nine hundred sixty-six".