1661000268 has 12 divisors (see below), whose sum is σ = 3875667320. Its totient is φ = 553666752.

The previous prime is 1661000227. The next prime is 1661000287. The reversal of 1661000268 is 8620001661.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69208333 + ... + 69208356.

Almost surely, 2^1661000268 is an apocalyptic number.

It is an amenable number.

1661000268 is an abundant number, since it is smaller than the sum of its proper divisors (2214667052).

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

1661000268 is a wasteful number, since it uses less digits than its factorization.

1661000268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138416696 (or 138416694 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1661000268 is about 40755.3710325400. The cubic root of 1661000268 is about 1184.2859241822.

The spelling of 1661000268 in words is "one billion, six hundred sixty-one million, two hundred sixty-eight", and thus it is an aban number.