1660889416 has 8 divisors (see below), whose sum is σ = 3114167670. Its totient is φ = 830444704.

The previous prime is 1660889413. The next prime is 1660889437. The reversal of 1660889416 is 6149880661.

It can be written as a sum of positive squares in only one way, i.e., 1660888516 + 900 = 40754^2 + 30^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1660889416.

It is not an unprimeable number, because it can be changed into a prime (1660889413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103805581 + ... + 103805596.

Almost surely, 2^1660889416 is an apocalyptic number.

It is an amenable number.

1660889416 is a deficient number, since it is larger than the sum of its proper divisors (1453278254).

1660889416 is a wasteful number, since it uses less digits than its factorization.

1660889416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207611183 (or 207611179 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 1660889416 is about 40754.0110418594. The cubic root of 1660889416 is about 1184.2595779325.

The spelling of 1660889416 in words is "one billion, six hundred sixty million, eight hundred eighty-nine thousand, four hundred sixteen".