1813666682 has 8 divisors (see below), whose sum is σ = 2729082996. Its totient is φ = 903972352.

The previous prime is 1813666643. The next prime is 1813666711. The reversal of 1813666682 is 2866663181.

It can be written as a sum of positive squares in 2 ways, for example, as 1544411401 + 269255281 = 39299^2 + 16409^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1429703 + ... + 1430970.

Almost surely, 2^1813666682 is an apocalyptic number.

1813666682 is a deficient number, since it is larger than the sum of its proper divisors (915416314).

1813666682 is a wasteful number, since it uses less digits than its factorization.

1813666682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2860992.

The product of its digits is 497664, while the sum is 47.

The square root of 1813666682 is about 42587.1656957821. The cubic root of 1813666682 is about 1219.5112890729.

The spelling of 1813666682 in words is "one billion, eight hundred thirteen million, six hundred sixty-six thousand, six hundred eighty-two".