999066881 has 2 divisors, whose sum is σ = 999066882. Its totient is φ = 999066880.

The previous prime is 999066877. The next prime is 999066961. The reversal of 999066881 is 188660999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 956046400 + 43020481 = 30920^2 + 6559^2 .

It is an emirp because it is prime and its reverse (188660999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999066881 - 2² = 999066877 is a prime.

It is a super-2 number, since 2×999066881² = 1996269265422136322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (999066821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499533440 + 499533441.

It is an arithmetic number, because the mean of its divisors is an integer number (499533441).

Almost surely, 2^999066881 is an apocalyptic number.

It is an amenable number.

999066881 is a deficient number, since it is larger than the sum of its proper divisors (1).

999066881 is an equidigital number, since it uses as much as digits as its factorization.

999066881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1679616, while the sum is 56.

The square root of 999066881 is about 31608.0192514495. The cubic root of 999066881 is about 999.6888635375.

The spelling of 999066881 in words is "nine hundred ninety-nine million, sixty-six thousand, eight hundred eighty-one".