99666240 has 224 divisors, whose sum is σ = 347618304. Its totient is φ = 24084480.

The previous prime is 99666233. The next prime is 99666289. The reversal of 99666240 is 4266699.

It is a junction number, because it is equal to n+sod(n) for n = 99666192 and 99666201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 505822 + ... + 506018.

Almost surely, 2^99666240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99666240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173809152).

99666240 is an abundant number, since it is smaller than the sum of its proper divisors (247952064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99666240 is a wasteful number, since it uses less digits than its factorization.

99666240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 99666240 is about 9983.2980522471. The cubic root of 99666240 is about 463.6419155604.

The spelling of 99666240 in words is "ninety-nine million, six hundred sixty-six thousand, two hundred forty".