402666 has 16 divisors (see below), whose sum is σ = 878688. Its totient is φ = 122000.

The previous prime is 402631. The next prime is 402691. The reversal of 402666 is 666204.

402666 is a modest number, since divided by 666 gives 402 as remainder.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 402666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2985 + ... + 3116.

It is an arithmetic number, because the mean of its divisors is an integer number (54918).

2⁴⁰²⁶⁶⁶ is an apocalyptic number.

402666 is an abundant number, since it is smaller than the sum of its proper divisors (476022).

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

402666 is a wasteful number, since it uses less digits than its factorization.

402666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6117.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 402666 is about 634.5596898638. The cubic root of 402666 is about 73.8439614400.

The spelling of 402666 in words is "four hundred two thousand, six hundred sixty-six".