1661000244 has 48 divisors (see below), whose sum is σ = 3934479360. Its totient is φ = 545287680.

The previous prime is 1661000227. The next prime is 1661000287. The reversal of 1661000244 is 4420001661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1128429 + ... + 1129899.

It is an arithmetic number, because the mean of its divisors is an integer number (81968320).

Almost surely, 2^1661000244 is an apocalyptic number.

It is an amenable number.

1661000244 is an abundant number, since it is smaller than the sum of its proper divisors (2273479116).

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

1661000244 is a wasteful number, since it uses less digits than its factorization.

1661000244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2840 (or 2838 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1661000244 is about 40755.3707381003. The cubic root of 1661000244 is about 1184.2859184783.

The spelling of 1661000244 in words is "one billion, six hundred sixty-one million, two hundred forty-four", and thus it is an aban number.