99965570 has 8 divisors (see below), whose sum is σ = 179938044. Its totient is φ = 39986224.

The previous prime is 99965557. The next prime is 99965611. The reversal of 99965570 is 7556999.

It can be written as a sum of positive squares in 2 ways, for example, as 93760489 + 6205081 = 9683^2 + 2491^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4998269 + ... + 4998288.

Almost surely, 2^99965570 is an apocalyptic number.

99965570 is a deficient number, since it is larger than the sum of its proper divisors (79972474).

99965570 is a wasteful number, since it uses less digits than its factorization.

99965570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9996564.

The product of its (nonzero) digits is 765450, while the sum is 50.

The square root of 99965570 is about 9998.2783517964. The cubic root of 99965570 is about 464.1056072786.

The spelling of 99965570 in words is "ninety-nine million, nine hundred sixty-five thousand, five hundred seventy".