654966 has 40 divisors (see below), whose sum is σ = 1585584. Its totient is φ = 200880.

The previous prime is 654943. The next prime is 654967. The reversal of 654966 is 669456.

It is a happy number.

It is a super-2 number, since 2×654966² = 857960922312, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 654966.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 654966.

It is not an unprimeable number, because it can be changed into a prime (654967) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1951 + ... + 2261.

2⁶⁵⁴⁹⁶⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 654966, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (792792).

654966 is an abundant number, since it is smaller than the sum of its proper divisors (930618).

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

654966 is a wasteful number, since it uses less digits than its factorization.

654966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338 (or 329 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 654966 is about 809.2996972692. The cubic root of 654966 is about 86.8439533317.

It can be divided in two parts, 6549 and 66, that multiplied together give a palindrome (432234).

The spelling of 654966 in words is "six hundred fifty-four thousand, nine hundred sixty-six".