678102066 has 12 divisors (see below), whose sum is σ = 1469221182. Its totient is φ = 226034016.

The previous prime is 678102059. The next prime is 678102079. The reversal of 678102066 is 660201876.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 651321441 + 26780625 = 25521^2 + 5175^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 678102066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18836151 + ... + 18836186.

Almost surely, 2^678102066 is an apocalyptic number.

678102066 is an abundant number, since it is smaller than the sum of its proper divisors (791119116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

678102066 is a wasteful number, since it uses less digits than its factorization.

678102066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37672345 (or 37672342 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 678102066 is about 26040.3929693851. The cubic root of 678102066 is about 878.5470453786.

The spelling of 678102066 in words is "six hundred seventy-eight million, one hundred two thousand, sixty-six".