661106944 has 27 divisors (see below), whose sum is σ = 1320453127. Its totient is φ = 330347776.

The previous prime is 661106911. The next prime is 661106947. The reversal of 661106944 is 449601166.

The square root of 661106944 is 25712.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661106947) by changing a digit.

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 2 ways as a sum of consecutive naturals, for example, 410589 + ... + 412195.

Almost surely, 2^661106944 is an apocalyptic number.

661106944 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

661106944 is the 25712-nd square number.

It is an amenable number.

661106944 is a deficient number, since it is larger than the sum of its proper divisors (659346183).

661106944 is an frugal number, since it uses more digits than its factorization.

661106944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3230 (or 1609 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The cubic root of 661106944 is about 871.1452500234.

The spelling of 661106944 in words is "six hundred sixty-one million, one hundred six thousand, nine hundred forty-four".