99966588 has 12 divisors (see below), whose sum is σ = 233255400. Its totient is φ = 33322192.

The previous prime is 99966583. The next prime is 99966589. The reversal of 99966588 is 88566999.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99966583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4165263 + ... + 4165286.

It is an arithmetic number, because the mean of its divisors is an integer number (19437950).

Almost surely, 2^99966588 is an apocalyptic number.

It is an amenable number.

99966588 is an abundant number, since it is smaller than the sum of its proper divisors (133288812).

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

99966588 is a wasteful number, since it uses less digits than its factorization.

99966588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8330556 (or 8330554 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 60.

The square root of 99966588 is about 9998.3292604315. The cubic root of 99966588 is about 464.1071826807.

The spelling of 99966588 in words is "ninety-nine million, nine hundred sixty-six thousand, five hundred eighty-eight".