1680804677 has 2 divisors, whose sum is σ = 1680804678. Its totient is φ = 1680804676.

The previous prime is 1680804667. The next prime is 1680804701. The reversal of 1680804677 is 7764080861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1363751041 + 317053636 = 36929^2 + 17806^2 .

It is a cyclic number.

It is not a de Polignac number, because 1680804677 - 2¹² = 1680800581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1680804607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840402338 + 840402339.

It is an arithmetic number, because the mean of its divisors is an integer number (840402339).

Almost surely, 2^1680804677 is an apocalyptic number.

It is an amenable number.

1680804677 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680804677 is an equidigital number, since it uses as much as digits as its factorization.

1680804677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 1680804677 is about 40997.6179429976. The cubic root of 1680804677 is about 1188.9741593563.

The spelling of 1680804677 in words is "one billion, six hundred eighty million, eight hundred four thousand, six hundred seventy-seven".