1668537011 has 8 divisors (see below), whose sum is σ = 1741911600. Its totient is φ = 1596218400.

The previous prime is 1668536993. The next prime is 1668537037. The reversal of 1668537011 is 1107358661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1668537011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668537071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260765 + ... + 267086.

It is an arithmetic number, because the mean of its divisors is an integer number (217738950).

Almost surely, 2^1668537011 is an apocalyptic number.

1668537011 is a deficient number, since it is larger than the sum of its proper divisors (73374589).

1668537011 is a wasteful number, since it uses less digits than its factorization.

1668537011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527989.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 1668537011 is about 40847.7295697080. The cubic root of 1668537011 is about 1186.0744433800.

The spelling of 1668537011 in words is "one billion, six hundred sixty-eight million, five hundred thirty-seven thousand, eleven".