654066 has 48 divisors (see below), whose sum is σ = 1684800. Its totient is φ = 179424.

The previous prime is 654053. The next prime is 654067. The reversal of 654066 is 660456.

654066 is a `hidden beast` number, since 654 + 0 + 6 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654067) by changing a digit.

654066 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 (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3565 + ... + 3743.

It is an arithmetic number, because the mean of its divisors is an integer number (35100).

2⁶⁵⁴⁰⁶⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 654066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (842400).

654066 is an abundant number, since it is smaller than the sum of its proper divisors (1030734).

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

654066 is a wasteful number, since it uses less digits than its factorization.

654066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 654066 is about 808.7434698345. The cubic root of 654066 is about 86.8041571766.

The spelling of 654066 in words is "six hundred fifty-four thousand, sixty-six".