654446646 has 72 divisors (see below), whose sum is σ = 1721242224. Its totient is φ = 178849440.

The previous prime is 654446641. The next prime is 654446647. The reversal of 654446646 is 646644456.

654446646 is a `hidden beast` number, since 6 + 544 + 4 + 66 + 46 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654446641) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4156 + ... + 36416.

It is an arithmetic number, because the mean of its divisors is an integer number (23906142).

Almost surely, 2^654446646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 654446646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (860621112).

654446646 is an abundant number, since it is smaller than the sum of its proper divisors (1066795578).

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

654446646 is a wasteful number, since it uses less digits than its factorization.

654446646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32306 (or 32296 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 45.

The square root of 654446646 is about 25582.1548349626. The cubic root of 654446646 is about 868.2099301459.

The spelling of 654446646 in words is "six hundred fifty-four million, four hundred forty-six thousand, six hundred forty-six".