1668597159909 has 8 divisors (see below), whose sum is σ = 2226031532032. Its totient is φ = 1111780447200.

The previous prime is 1668597159899. The next prime is 1668597159917. The reversal of 1668597159909 is 9099517958661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1668597159909 - 2⁵ = 1668597159877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668597159919) 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, 154408549 + ... + 154419354.

It is an arithmetic number, because the mean of its divisors is an integer number (278253941504).

Almost surely, 2^{1668597159909} is an apocalyptic number.

It is an amenable number.

1668597159909 is a deficient number, since it is larger than the sum of its proper divisors (557434372123).

1668597159909 is a wasteful number, since it uses less digits than its factorization.

1668597159909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308829707.

The product of its (nonzero) digits is 330674400, while the sum is 75.

The spelling of 1668597159909 in words is "one trillion, six hundred sixty-eight billion, five hundred ninety-seven million, one hundred fifty-nine thousand, nine hundred nine".