678700695872 has 28 divisors (see below), whose sum is σ = 1347033987156. Its totient is φ = 339290557440.

The previous prime is 678700695857. The next prime is 678700695919. The reversal of 678700695872 is 278596007876.

It can be written as a sum of positive squares in 2 ways, for example, as 383477993536 + 295222702336 = 619256^2 + 543344^2 .

It is a junction number, because it is equal to n+sod(n) for n = 678700695799 and 678700695808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 567029 + ... + 1295732.

Almost surely, 2^678700695872 is an apocalyptic number.

It is an amenable number.

678700695872 is a deficient number, since it is larger than the sum of its proper divisors (668333291284).

678700695872 is a wasteful number, since it uses less digits than its factorization.

678700695872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868466 (or 1868456 counting only the distinct ones).

The product of its (nonzero) digits is 71124480, while the sum is 65.

The spelling of 678700695872 in words is "six hundred seventy-eight billion, seven hundred million, six hundred ninety-five thousand, eight hundred seventy-two".