99998766 has 64 divisors (see below), whose sum is σ = 255951360. Its totient is φ = 28347840.

The previous prime is 99998749. The next prime is 99998783. The reversal of 99998766 is 66789999.

It is an interprime number because it is at equal distance from previous prime (99998749) and next prime (99998783).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nialpdrome in base 10.

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 in 31 ways as a sum of consecutive naturals, for example, 50821 + ... + 52751.

It is an arithmetic number, because the mean of its divisors is an integer number (3999240).

Almost surely, 2^99998766 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99998766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127975680).

99998766 is an abundant number, since it is smaller than the sum of its proper divisors (155952594).

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

99998766 is a wasteful number, since it uses less digits than its factorization.

99998766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2086 (or 2080 counting only the distinct ones).

The product of its digits is 13226976, while the sum is 63.

The square root of 99998766 is about 9999.9382998097. The cubic root of 99998766 is about 464.1569741132.

The spelling of 99998766 in words is "ninety-nine million, nine hundred ninety-eight thousand, seven hundred sixty-six".