1668836133 has 12 divisors (see below), whose sum is σ = 2411081088. Its totient is φ = 1112308200.

The previous prime is 1668836087. The next prime is 1668836159. The reversal of 1668836133 is 3316388661.

It is not a de Polignac number, because 1668836133 - 2⁸ = 1668835877 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668836033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27558 + ... + 64008.

It is an arithmetic number, because the mean of its divisors is an integer number (200923424).

Almost surely, 2^1668836133 is an apocalyptic number.

It is an amenable number.

1668836133 is a deficient number, since it is larger than the sum of its proper divisors (742244955).

1668836133 is a wasteful number, since it uses less digits than its factorization.

1668836133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41544 (or 41541 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 1668836133 is about 40851.3908331161. The cubic root of 1668836133 is about 1186.1453157988.

The spelling of 1668836133 in words is "one billion, six hundred sixty-eight million, eight hundred thirty-six thousand, one hundred thirty-three".