99665958 has 16 divisors (see below), whose sum is σ = 227808000. Its totient is φ = 28475976.

The previous prime is 99665921. The next prime is 99665971. The reversal of 99665958 is 85956699.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 99665898 and 99665907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1186458 + ... + 1186541.

It is an arithmetic number, because the mean of its divisors is an integer number (14238000).

Almost surely, 2^99665958 is an apocalyptic number.

99665958 is an abundant number, since it is smaller than the sum of its proper divisors (128142042).

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

99665958 is a wasteful number, since it uses less digits than its factorization.

99665958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2373011.

The product of its digits is 5248800, while the sum is 57.

The square root of 99665958 is about 9983.2839286479. The cubic root of 99665958 is about 463.6414782771.

The spelling of 99665958 in words is "ninety-nine million, six hundred sixty-five thousand, nine hundred fifty-eight".