99680729727 has 4 divisors (see below), whose sum is σ = 132907639640. Its totient is φ = 66453819816.

The previous prime is 99680729719. The next prime is 99680729761. The reversal of 99680729727 is 72792708699.

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

It is not a de Polignac number, because 99680729727 - 2³ = 99680729719 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 (99680729717) 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, 16613454952 + ... + 16613454957.

It is an arithmetic number, because the mean of its divisors is an integer number (33226909910).

Almost surely, 2^99680729727 is an apocalyptic number.

99680729727 is a deficient number, since it is larger than the sum of its proper divisors (33226909913).

99680729727 is a wasteful number, since it uses less digits than its factorization.

99680729727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33226909912.

The product of its (nonzero) digits is 48009024, while the sum is 66.

It can be divided in two parts, 9968072 and 9727, that added together give a palindrome (9977799).

The spelling of 99680729727 in words is "ninety-nine billion, six hundred eighty million, seven hundred twenty-nine thousand, seven hundred twenty-seven".