1680067257 has 16 divisors (see below), whose sum is σ = 2468932032. Its totient is φ = 1007723520.

The previous prime is 1680067219. The next prime is 1680067297. The reversal of 1680067257 is 7527600861.

It is not a de Polignac number, because 1680067257 - 2¹⁴ = 1680050873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1680067297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259228 + ... + 265629.

It is an arithmetic number, because the mean of its divisors is an integer number (154308252).

Almost surely, 2^1680067257 is an apocalyptic number.

It is an amenable number.

1680067257 is a deficient number, since it is larger than the sum of its proper divisors (788864775).

1680067257 is a wasteful number, since it uses less digits than its factorization.

1680067257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524968.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 1680067257 is about 40988.6235070172. The cubic root of 1680067257 is about 1188.8002542441.

The spelling of 1680067257 in words is "one billion, six hundred eighty million, sixty-seven thousand, two hundred fifty-seven".