99667566 has 48 divisors (see below), whose sum is σ = 234855504. Its totient is φ = 30419712.

The previous prime is 99667553. The next prime is 99667571. The reversal of 99667566 is 66576699.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6921 + ... + 15723.

It is an arithmetic number, because the mean of its divisors is an integer number (4892823).

Almost surely, 2^99667566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99667566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117427752).

99667566 is an abundant number, since it is smaller than the sum of its proper divisors (135187938).

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

99667566 is a wasteful number, since it uses less digits than its factorization.

99667566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8865 (or 8862 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 54.

The square root of 99667566 is about 9983.3644629453. The cubic root of 99667566 is about 463.6439717112.

The spelling of 99667566 in words is "ninety-nine million, six hundred sixty-seven thousand, five hundred sixty-six".