99866666 has 4 divisors (see below), whose sum is σ = 149800002. Its totient is φ = 49933332.

The previous prime is 99866659. The next prime is 99866707. The reversal of 99866666 is 66666899.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 99580441 + 286225 = 9979^2 + 535^2 .

99866666 is a modest number, since divided by 66666 gives 998 as remainder.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24966665 + ... + 24966668.

Almost surely, 2^99866666 is an apocalyptic number.

99866666 is a deficient number, since it is larger than the sum of its proper divisors (49933336).

99866666 is a wasteful number, since it uses less digits than its factorization.

99866666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49933335.

The product of its digits is 5038848, while the sum is 56.

The square root of 99866666 is about 9993.3310762728. The cubic root of 99866666 is about 463.9524977382.

It can be divided in two parts, 998666 and 66, that multiplied together give a palindrome (65911956).

The spelling of 99866666 in words is "ninety-nine million, eight hundred sixty-six thousand, six hundred sixty-six".