660220446 has 16 divisors (see below), whose sum is σ = 1342088208. Its totient is φ = 216465600.

The previous prime is 660220433. The next prime is 660220501. The reversal of 660220446 is 644022066.

660220446 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 901575 + ... + 902306.

It is an arithmetic number, because the mean of its divisors is an integer number (83880513).

Almost surely, 2^660220446 is an apocalyptic number.

660220446 is an abundant number, since it is smaller than the sum of its proper divisors (681867762).

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

660220446 is a wasteful number, since it uses less digits than its factorization.

660220446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1803947.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 660220446 is about 25694.7552235860. The cubic root of 660220446 is about 870.7556943082.

The spelling of 660220446 in words is "six hundred sixty million, two hundred twenty thousand, four hundred forty-six".