99660927385 has 4 divisors (see below), whose sum is σ = 119593112868. Its totient is φ = 79728741904.

The previous prime is 99660927367. The next prime is 99660927397. The reversal of 99660927385 is 58372906699.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43408472409 + 56252454976 = 208347^2 + 237176^2 .

It is a cyclic number.

It is not a de Polignac number, because 99660927385 - 2¹⁹ = 99660403097 is a prime.

It is a Duffinian 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, 9966092734 + ... + 9966092743.

It is an arithmetic number, because the mean of its divisors is an integer number (29898278217).

Almost surely, 2^99660927385 is an apocalyptic number.

It is an amenable number.

99660927385 is a deficient number, since it is larger than the sum of its proper divisors (19932185483).

99660927385 is a wasteful number, since it uses less digits than its factorization.

99660927385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19932185482.

The product of its (nonzero) digits is 44089920, while the sum is 64.

The spelling of 99660927385 in words is "ninety-nine billion, six hundred sixty million, nine hundred twenty-seven thousand, three hundred eighty-five".