99221666 has 8 divisors (see below), whose sum is σ = 149655324. Its totient is φ = 49336560.

The previous prime is 99221663. The next prime is 99221711. The reversal of 99221666 is 66612299.

It can be written as a sum of positive squares in 2 ways, for example, as 87965641 + 11256025 = 9379^2 + 3355^2 .

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

It is not an unprimeable number, because it can be changed into a prime (99221663) 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, 136685 + ... + 137408.

Almost surely, 2^99221666 is an apocalyptic number.

99221666 is a deficient number, since it is larger than the sum of its proper divisors (50433658).

99221666 is a wasteful number, since it uses less digits than its factorization.

99221666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274276.

The product of its digits is 69984, while the sum is 41.

The square root of 99221666 is about 9961.0072783830. The cubic root of 99221666 is about 462.9515099885.

The spelling of 99221666 in words is "ninety-nine million, two hundred twenty-one thousand, six hundred sixty-six".