99661845 has 8 divisors (see below), whose sum is σ = 159458976. Its totient is φ = 53152976.

The previous prime is 99661843. The next prime is 99661867. The reversal of 99661845 is 54816699.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99661845 - 2¹ = 99661843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99661794 and 99661803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99661843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3322047 + ... + 3322076.

It is an arithmetic number, because the mean of its divisors is an integer number (19932372).

Almost surely, 2^99661845 is an apocalyptic number.

It is an amenable number.

99661845 is a deficient number, since it is larger than the sum of its proper divisors (59797131).

99661845 is a wasteful number, since it uses less digits than its factorization.

99661845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6644131.

The product of its digits is 466560, while the sum is 48.

The square root of 99661845 is about 9983.0779321810. The cubic root of 99661845 is about 463.6351003601.

It can be divided in two parts, 9966 and 1845, that added together give a palindrome (11811).

The spelling of 99661845 in words is "ninety-nine million, six hundred sixty-one thousand, eight hundred forty-five".