1668683336 has 16 divisors (see below), whose sum is σ = 3130735740. Its totient is φ = 833820480.

The previous prime is 1668683329. The next prime is 1668683363. The reversal of 1668683336 is 6333868661.

It can be written as a sum of positive squares in 2 ways, for example, as 1496916100 + 171767236 = 38690^2 + 13106^2 .

It is a super-3 number, since 3×1668683336³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51371 + ... + 77306.

Almost surely, 2^1668683336 is an apocalyptic number.

It is an amenable number.

1668683336 is a deficient number, since it is larger than the sum of its proper divisors (1462052404).

1668683336 is a wasteful number, since it uses less digits than its factorization.

1668683336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130304 (or 130300 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 50.

The square root of 1668683336 is about 40849.5206336623. The cubic root of 1668683336 is about 1186.1091139265.

The spelling of 1668683336 in words is "one billion, six hundred sixty-eight million, six hundred eighty-three thousand, three hundred thirty-six".