1680770078 has 32 divisors (see below), whose sum is σ = 2761843392. Its totient is φ = 762451200.

The previous prime is 1680770071. The next prime is 1680770141. The reversal of 1680770078 is 8700770861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680770071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 687338 + ... + 689778.

It is an arithmetic number, because the mean of its divisors is an integer number (86307606).

Almost surely, 2^1680770078 is an apocalyptic number.

1680770078 is a deficient number, since it is larger than the sum of its proper divisors (1081073314).

1680770078 is a wasteful number, since it uses less digits than its factorization.

1680770078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900.

The product of its (nonzero) digits is 131712, while the sum is 44.

The square root of 1680770078 is about 40997.1959772861. The cubic root of 1680770078 is about 1188.9660010419.

The spelling of 1680770078 in words is "one billion, six hundred eighty million, seven hundred seventy thousand, seventy-eight".