99966595 has 4 divisors (see below), whose sum is σ = 119959920. Its totient is φ = 79973272.

The previous prime is 99966589. The next prime is 99966631. The reversal of 99966595 is 59566999.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59566999 = 587 ⋅101477.

It is a cyclic number.

It is not a de Polignac number, because 99966595 - 2¹⁹ = 99442307 is a prime.

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, 9996655 + ... + 9996664.

It is an arithmetic number, because the mean of its divisors is an integer number (29989980).

Almost surely, 2^99966595 is an apocalyptic number.

99966595 is a deficient number, since it is larger than the sum of its proper divisors (19993325).

99966595 is a wasteful number, since it uses less digits than its factorization.

99966595 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19993324.

The product of its digits is 5904900, while the sum is 58.

The square root of 99966595 is about 9998.3296104899. The cubic root of 99966595 is about 464.1071935135.

The spelling of 99966595 in words is "ninety-nine million, nine hundred sixty-six thousand, five hundred ninety-five".