420066 has 20 divisors (see below), whose sum is σ = 941622. Its totient is φ = 139968.

The previous prime is 420047. The next prime is 420073. The reversal of 420066 is 660024.

It can be written as a sum of positive squares in only one way, i.e., 342225 + 77841 = 585^2 + 279^2 .

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

420066 is a modest number, since divided by 66 gives 42 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1135 + ... + 1458.

2⁴²⁰⁰⁶⁶ is an apocalyptic number.

420066 is an abundant number, since it is smaller than the sum of its proper divisors (521556).

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

420066 is a wasteful number, since it uses less digits than its factorization.

420066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2607 (or 2598 counting only the distinct ones).

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

The square root of 420066 is about 648.1249879460. The cubic root of 420066 is about 74.8926464094.

The spelling of 420066 in words is "four hundred twenty thousand, sixty-six".