668292 has 12 divisors (see below), whose sum is σ = 1559376. Its totient is φ = 222760.

The previous prime is 668273. The next prime is 668303. The reversal of 668292 is 292866.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×668292² = 893228394528, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 668292.

It is an unprimeable number.

668292 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27834 + ... + 27857.

It is an arithmetic number, because the mean of its divisors is an integer number (129948).

2⁶⁶⁸²⁹² is an apocalyptic number.

It is an amenable number.

668292 is an abundant number, since it is smaller than the sum of its proper divisors (891084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668292 is a wasteful number, since it uses less digits than its factorization.

668292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55698 (or 55696 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 668292 is about 817.4912843572. The cubic root of 668292 is about 87.4289818305.

The spelling of 668292 in words is "six hundred sixty-eight thousand, two hundred ninety-two".