99021966 has 8 divisors (see below), whose sum is σ = 198043944. Its totient is φ = 33007320.

The previous prime is 99021961. The next prime is 99022009. The reversal of 99021966 is 66912099.

It is a happy number.

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

99021966 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99021961) 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, 8251825 + ... + 8251836.

It is an arithmetic number, because the mean of its divisors is an integer number (24755493).

Almost surely, 2^99021966 is an apocalyptic number.

99021966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

99021966 is a wasteful number, since it uses less digits than its factorization.

99021966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16503666.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 99021966 is about 9950.9781428762. The cubic root of 99021966 is about 462.6407125780.

The spelling of 99021966 in words is "ninety-nine million, twenty-one thousand, nine hundred sixty-six".