1661026112 has 28 divisors (see below), whose sum is σ = 3376496676. Its totient is φ = 810255360.

The previous prime is 1661026099. The next prime is 1661026139. The reversal of 1661026112 is 2116201661.

It can be written as a sum of positive squares in 2 ways, for example, as 97930816 + 1563095296 = 9896^2 + 39536^2 .

It is a congruent number.

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, 313883 + ... + 319130.

It is an arithmetic number, because the mean of its divisors is an integer number (120589167).

Almost surely, 2^1661026112 is an apocalyptic number.

It is an amenable number.

1661026112 is an abundant number, since it is smaller than the sum of its proper divisors (1715470564).

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

1661026112 is an equidigital number, since it uses as much as digits as its factorization.

1661026112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633066 (or 633056 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1661026112 is about 40755.6880938109. The cubic root of 1661026112 is about 1184.2920663700.

Adding to 1661026112 its reverse (2116201661), we get a palindrome (3777227773).

The spelling of 1661026112 in words is "one billion, six hundred sixty-one million, twenty-six thousand, one hundred twelve".