99966213 has 12 divisors (see below), whose sum is σ = 144527500. Its totient is φ = 66583296.

The previous prime is 99966203. The next prime is 99966233. The reversal of 99966213 is 31266999.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26040609 + 73925604 = 5103^2 + 8598^2 .

It is not a de Polignac number, because 99966213 - 2⁴ = 99966197 is a prime.

It is a super-2 number, since 2×99966213² = 19986487483122738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99966203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6795 + ... + 15687.

Almost surely, 2^99966213 is an apocalyptic number.

It is an amenable number.

99966213 is a deficient number, since it is larger than the sum of its proper divisors (44561287).

99966213 is a wasteful number, since it uses less digits than its factorization.

99966213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10148 (or 10145 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 99966213 is about 9998.3105072807. The cubic root of 99966213 is about 464.1066023521.

The spelling of 99966213 in words is "ninety-nine million, nine hundred sixty-six thousand, two hundred thirteen".