99988766 has 4 divisors (see below), whose sum is σ = 149983152. Its totient is φ = 49994382.

The previous prime is 99988753. The next prime is 99988771. The reversal of 99988766 is 66788999.

It is a semiprime because it is the product of two primes.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 99988699 and 99988708.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 24997190 + ... + 24997193.

It is an arithmetic number, because the mean of its divisors is an integer number (37495788).

Almost surely, 2^99988766 is an apocalyptic number.

99988766 is a deficient number, since it is larger than the sum of its proper divisors (49994386).

99988766 is a wasteful number, since it uses less digits than its factorization.

99988766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49994385.

The product of its digits is 11757312, while the sum is 62.

The square root of 99988766 is about 9999.4382842238. The cubic root of 99988766 is about 464.1415015074.

The spelling of 99988766 in words is "ninety-nine million, nine hundred eighty-eight thousand, seven hundred sixty-six".