99966568 has 64 divisors (see below), whose sum is σ = 211115520. Its totient is φ = 44064000.

The previous prime is 99966557. The next prime is 99966577. The reversal of 99966568 is 86566999.

It is a happy 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, 325471 + ... + 325777.

It is an arithmetic number, because the mean of its divisors is an integer number (3298680).

Almost surely, 2^99966568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99966568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105557760).

99966568 is an abundant number, since it is smaller than the sum of its proper divisors (111148952).

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

99966568 is a wasteful number, since it uses less digits than its factorization.

99966568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458 (or 454 counting only the distinct ones).

The product of its digits is 6298560, while the sum is 58.

The square root of 99966568 is about 9998.3282602643. The cubic root of 99966568 is about 464.1071517299.

The spelling of 99966568 in words is "ninety-nine million, nine hundred sixty-six thousand, five hundred sixty-eight".