99985664 has 72 divisors (see below), whose sum is σ = 211529472. Its totient is φ = 47093760.

The previous prime is 99985663. The next prime is 99985673. The reversal of 99985664 is 46658999.

It is not an unprimeable number, because it can be changed into a prime (99985661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341102 + ... + 341394.

Almost surely, 2^99985664 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 99985664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105764736).

99985664 is an abundant number, since it is smaller than the sum of its proper divisors (111543808).

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

99985664 is a wasteful number, since it uses less digits than its factorization.

99985664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383 (or 369 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 56.

The square root of 99985664 is about 9999.2831743080. The cubic root of 99985664 is about 464.1367016954.

The spelling of 99985664 in words is "ninety-nine million, nine hundred eighty-five thousand, six hundred sixty-four".