1665968 has 10 divisors (see below), whose sum is σ = 3227844. Its totient is φ = 832976.

The previous prime is 1665967. The next prime is 1665973. The reversal of 1665968 is 8695661.

It is not an unprimeable number, because it can be changed into a prime (1665967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52046 + ... + 52077.

2^1665968 is an apocalyptic number.

It is an amenable number.

1665968 is a deficient number, since it is larger than the sum of its proper divisors (1561876).

1665968 is a wasteful number, since it uses less digits than its factorization.

1665968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104131 (or 104125 counting only the distinct ones).

The product of its digits is 77760, while the sum is 41.

The square root of 1665968 is about 1290.7238279353. The cubic root of 1665968 is about 118.5465406155.

The spelling of 1665968 in words is "one million, six hundred sixty-five thousand, nine hundred sixty-eight".