87878766 has 16 divisors (see below), whose sum is σ = 175919184. Its totient is φ = 29265984.

The previous prime is 87878761. The next prime is 87878773. The reversal of 87878766 is 66787878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87878761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1020 + ... + 13296.

It is an arithmetic number, because the mean of its divisors is an integer number (10994949).

Almost surely, 2^87878766 is an apocalyptic number.

87878766 is an abundant number, since it is smaller than the sum of its proper divisors (88040418).

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

87878766 is a wasteful number, since it uses less digits than its factorization.

87878766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13475.

The product of its digits is 6322176, while the sum is 57.

The square root of 87878766 is about 9374.3674986636. The cubic root of 87878766 is about 444.5916651496.

The spelling of 87878766 in words is "eighty-seven million, eight hundred seventy-eight thousand, seven hundred sixty-six".