1680661112 has 32 divisors (see below), whose sum is σ = 3572259600. Its totient is φ = 734863104.

The previous prime is 1680661097. The next prime is 1680661117. The reversal of 1680661112 is 2111660861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680661117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423293 + ... + 427244.

Almost surely, 2^1680661112 is an apocalyptic number.

It is an amenable number.

1680661112 is an abundant number, since it is smaller than the sum of its proper divisors (1891598488).

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

1680661112 is a wasteful number, since it uses less digits than its factorization.

1680661112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850575 (or 850571 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 1680661112 is about 40995.8670112000. The cubic root of 1680661112 is about 1188.9403065362.

The spelling of 1680661112 in words is "one billion, six hundred eighty million, six hundred sixty-one thousand, one hundred twelve".