1668335353537 has 16 divisors (see below), whose sum is σ = 1746635477760. Its totient is φ = 1590524269312.

The previous prime is 1668335353523. The next prime is 1668335353543. The reversal of 1668335353537 is 7353535338661.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1668335353537 is a prime.

It is a super-2 number, since 2×1668335353537² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668335353547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8368773 + ... + 8565805.

It is an arithmetic number, because the mean of its divisors is an integer number (109164717360).

Almost surely, 2^{1668335353537} is an apocalyptic number.

It is an amenable number.

1668335353537 is a deficient number, since it is larger than the sum of its proper divisors (78300124223).

1668335353537 is a wasteful number, since it uses less digits than its factorization.

1668335353537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198272.

The product of its digits is 61236000, while the sum is 58.

The spelling of 1668335353537 in words is "one trillion, six hundred sixty-eight billion, three hundred thirty-five million, three hundred fifty-three thousand, five hundred thirty-seven".