999662 has 16 divisors (see below), whose sum is σ = 1566432. Its totient is φ = 478080.

The previous prime is 999653. The next prime is 999667. The reversal of 999662 is 266999.

It is a happy number.

It is a super-2 number, since 2×999662² = 1998648228488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5903 + ... + 6069.

It is an arithmetic number, because the mean of its divisors is an integer number (97902).

2⁹⁹⁹⁶⁶² is an apocalyptic number.

999662 is a deficient number, since it is larger than the sum of its proper divisors (566770).

999662 is a wasteful number, since it uses less digits than its factorization.

999662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283.

The product of its digits is 52488, while the sum is 41.

The square root of 999662 is about 999.8309857171. The cubic root of 999662 is about 99.9887320637.

It can be divided in two parts, 999 and 662, that added together give a palindrome (1661).

The spelling of 999662 in words is "nine hundred ninety-nine thousand, six hundred sixty-two".