678106674 has 64 divisors (see below), whose sum is σ = 1725511680. Its totient is φ = 193369680.

The previous prime is 678106661. The next prime is 678106687. The reversal of 678106674 is 476601876.

It is an interprime number because it is at equal distance from previous prime (678106661) and next prime (678106687).

It is a super-2 number, since 2×678106674² = 919657322646684552, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 237097 + ... + 239939.

It is an arithmetic number, because the mean of its divisors is an integer number (26961120).

Almost surely, 2^678106674 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678106674, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (862755840).

678106674 is an abundant number, since it is smaller than the sum of its proper divisors (1047405006).

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

678106674 is a wasteful number, since it uses less digits than its factorization.

678106674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3492 (or 3486 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 678106674 is about 26040.4814471622. The cubic root of 678106674 is about 878.5490354112.

The spelling of 678106674 in words is "six hundred seventy-eight million, one hundred six thousand, six hundred seventy-four".