1668336534 has 128 divisors (see below), whose sum is σ = 4126464000. Its totient is φ = 497435904.

The previous prime is 1668336521. The next prime is 1668336557. The reversal of 1668336534 is 4356338661.

1668336534 is a `hidden beast` number, since 1 + 6 + 6 + 83 + 36 + 534 = 666.

1668336534 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1668336534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1397842 + ... + 1399034.

It is an arithmetic number, because the mean of its divisors is an integer number (32238000).

Almost surely, 2^1668336534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1668336534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2063232000).

1668336534 is an abundant number, since it is smaller than the sum of its proper divisors (2458127466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1668336534 is a wasteful number, since it uses less digits than its factorization.

1668336534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299 (or 1293 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The square root of 1668336534 is about 40845.2755407526. The cubic root of 1668336534 is about 1186.0269386562.

The spelling of 1668336534 in words is "one billion, six hundred sixty-eight million, three hundred thirty-six thousand, five hundred thirty-four".