99965680 has 40 divisors (see below), whose sum is σ = 233636832. Its totient is φ = 39777024.

The previous prime is 99965653. The next prime is 99965683. The reversal of 99965680 is 8656999.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99965683) 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, 12589 + ... + 18931.

Almost surely, 2^99965680 is an apocalyptic number.

It is an amenable number.

99965680 is an abundant number, since it is smaller than the sum of its proper divisors (133671152).

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

99965680 is a wasteful number, since it uses less digits than its factorization.

99965680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6553 (or 6547 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 52.

The square root of 99965680 is about 9998.2838527419. The cubic root of 99965680 is about 464.1057775092.

The spelling of 99965680 in words is "ninety-nine million, nine hundred sixty-five thousand, six hundred eighty".