402066 has 24 divisors (see below), whose sum is σ = 995904. Its totient is φ = 114840.

The previous prime is 402053. The next prime is 402071. The reversal of 402066 is 660204.

402066 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable 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 11 ways as a sum of consecutive naturals, for example, 1470 + ... + 1721.

It is an arithmetic number, because the mean of its divisors is an integer number (41496).

2⁴⁰²⁰⁶⁶ is an apocalyptic number.

402066 is an abundant number, since it is smaller than the sum of its proper divisors (593838).

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

402066 is a wasteful number, since it uses less digits than its factorization.

402066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3206 (or 3203 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 402066 is about 634.0867448544. The cubic root of 402066 is about 73.8072656825.

The spelling of 402066 in words is "four hundred two thousand, sixty-six".