678706626 has 16 divisors (see below), whose sum is σ = 1461829824. Its totient is φ = 208832784.

The previous prime is 678706621. The next prime is 678706627. The reversal of 678706626 is 626607876.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (678706621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4350606 + ... + 4350761.

It is an arithmetic number, because the mean of its divisors is an integer number (91364364).

Almost surely, 2^678706626 is an apocalyptic number.

678706626 is an abundant number, since it is smaller than the sum of its proper divisors (783123198).

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

678706626 is a wasteful number, since it uses less digits than its factorization.

678706626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8701385.

The product of its (nonzero) digits is 1016064, while the sum is 48.

The square root of 678706626 is about 26051.9985029940. The cubic root of 678706626 is about 878.8080565463.

The spelling of 678706626 in words is "six hundred seventy-eight million, seven hundred six thousand, six hundred twenty-six".