999166263 has 8 divisors (see below), whose sum is σ = 1334057088. Its totient is φ = 665193144.

The previous prime is 999166237. The next prime is 999166271. The reversal of 999166263 is 362661999.

It is a happy number.

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

It is not a de Polignac number, because 999166263 - 2¹⁰ = 999165239 is a prime.

It is a super-2 number, since 2×999166263² = 1996666442234770338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999166283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226881 + ... + 231242.

It is an arithmetic number, because the mean of its divisors is an integer number (166757136).

Almost surely, 2^999166263 is an apocalyptic number.

999166263 is a deficient number, since it is larger than the sum of its proper divisors (334890825).

999166263 is a wasteful number, since it uses less digits than its factorization.

999166263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458853.

The product of its digits is 944784, while the sum is 51.

The square root of 999166263 is about 31609.5913133973. The cubic root of 999166263 is about 999.7220103956.

The spelling of 999166263 in words is "nine hundred ninety-nine million, one hundred sixty-six thousand, two hundred sixty-three".