99966320 has 80 divisors (see below), whose sum is σ = 242341632. Its totient is φ = 38307840.

The previous prime is 99966301. The next prime is 99966329. The reversal of 99966320 is 2366999.

It is a tau number, because it is divible by the number of its divisors (80).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99966329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428924 + ... + 429156.

Almost surely, 2^99966320 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 99966320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121170816).

99966320 is an abundant number, since it is smaller than the sum of its proper divisors (142375312).

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

99966320 is a wasteful number, since it uses less digits than its factorization.

99966320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 44.

The square root of 99966320 is about 9998.3158581833. The cubic root of 99966320 is about 464.1067679394.

The spelling of 99966320 in words is "ninety-nine million, nine hundred sixty-six thousand, three hundred twenty".