1665053968 has 10 divisors (see below), whose sum is σ = 3226042094. Its totient is φ = 832526976.

The previous prime is 1665053959. The next prime is 1665053969. The reversal of 1665053968 is 8693505661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1368112144 + 296941824 = 36988^2 + 17232^2 .

It is not an unprimeable number, because it can be changed into a prime (1665053969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52032921 + ... + 52032952.

Almost surely, 2^1665053968 is an apocalyptic number.

It is an amenable number.

1665053968 is a deficient number, since it is larger than the sum of its proper divisors (1560988126).

1665053968 is a wasteful number, since it uses less digits than its factorization.

1665053968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104065881 (or 104065875 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 49.

The square root of 1665053968 is about 40805.0728218931. The cubic root of 1665053968 is about 1185.2485649476.

The spelling of 1665053968 in words is "one billion, six hundred sixty-five million, fifty-three thousand, nine hundred sixty-eight".