678133682 has 4 divisors (see below), whose sum is σ = 1017200526. Its totient is φ = 339066840.

The previous prime is 678133591. The next prime is 678133699. The reversal of 678133682 is 286331876.

It is a Cunningham number, because it is equal to 26041²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 678133681 + 1 = 26041^2 + 1^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169533419 + ... + 169533422.

Almost surely, 2^678133682 is an apocalyptic number.

678133682 is a deficient number, since it is larger than the sum of its proper divisors (339066844).

678133682 is a wasteful number, since it uses less digits than its factorization.

678133682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339066843.

The product of its digits is 290304, while the sum is 44.

The square root of 678133682 is about 26041.0000192005. Note that the first 4 decimals coincide. The cubic root of 678133682 is about 878.5606990320.

The spelling of 678133682 in words is "six hundred seventy-eight million, one hundred thirty-three thousand, six hundred eighty-two".