676778555 has 16 divisors (see below), whose sum is σ = 820116480. Its totient is φ = 536118912.

The previous prime is 676778549. The next prime is 676778561. The reversal of 676778555 is 555877676.

676778555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (676778549) and next prime (676778561).

It is a cyclic number.

It is not a de Polignac number, because 676778555 - 2¹⁴ = 676762171 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 676778555.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 632561 + ... + 633629.

It is an arithmetic number, because the mean of its divisors is an integer number (51257280).

Almost surely, 2^676778555 is an apocalyptic number.

676778555 is a deficient number, since it is larger than the sum of its proper divisors (143337925).

676778555 is a wasteful number, since it uses less digits than its factorization.

676778555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2198.

The product of its digits is 12348000, while the sum is 56.

The square root of 676778555 is about 26014.9679031130. The cubic root of 676778555 is about 877.9750941197.

The spelling of 676778555 in words is "six hundred seventy-six million, seven hundred seventy-eight thousand, five hundred fifty-five".