1680732766 has 8 divisors (see below), whose sum is σ = 2602425024. Its totient is φ = 813257760.

The previous prime is 1680732763. The next prime is 1680732791. The reversal of 1680732766 is 6672370861.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680732763) by changing a digit.

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, 13554235 + ... + 13554358.

It is an arithmetic number, because the mean of its divisors is an integer number (325303128).

Almost surely, 2^1680732766 is an apocalyptic number.

1680732766 is a deficient number, since it is larger than the sum of its proper divisors (921692258).

1680732766 is a wasteful number, since it uses less digits than its factorization.

1680732766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27108626.

The product of its (nonzero) digits is 508032, while the sum is 46.

The square root of 1680732766 is about 40996.7409192487. The cubic root of 1680732766 is about 1188.9572028868.

The spelling of 1680732766 in words is "one billion, six hundred eighty million, seven hundred thirty-two thousand, seven hundred sixty-six".