9999266653 has 4 divisors (see below), whose sum is σ = 10040757628. Its totient is φ = 9957775680.

The previous prime is 9999266587. The next prime is 9999266657. The reversal of 9999266653 is 3566629999.

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 5293581049 + 4705685604 = 72757^2 + 68598^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999266653 - 2⁹ = 9999266141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999266657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20745126 + ... + 20745607.

It is an arithmetic number, because the mean of its divisors is an integer number (2510189407).

Almost surely, 2^9999266653 is an apocalyptic number.

It is an amenable number.

9999266653 is a deficient number, since it is larger than the sum of its proper divisors (41490975).

9999266653 is a wasteful number, since it uses less digits than its factorization.

9999266653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41490974.

The product of its digits is 42515280, while the sum is 64.

The square root of 9999266653 is about 99996.3331977728. Note that the first 3 decimals coincide. The cubic root of 9999266653 is about 2154.3820238039.

The spelling of 9999266653 in words is "nine billion, nine hundred ninety-nine million, two hundred sixty-six thousand, six hundred fifty-three".