670816636 has 12 divisors (see below), whose sum is σ = 1341633328. Its totient is φ = 287492832.

The previous prime is 670816631. The next prime is 670816673. The reversal of 670816636 is 636618076.

670816636 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 670816592 and 670816601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670816631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11978841 + ... + 11978896.

Almost surely, 2^670816636 is an apocalyptic number.

It is an amenable number.

670816636 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

670816636 is a wasteful number, since it uses less digits than its factorization.

670816636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23957748 (or 23957746 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 670816636 is about 25900.1281077913. The cubic root of 670816636 is about 875.3893825053.

The spelling of 670816636 in words is "six hundred seventy million, eight hundred sixteen thousand, six hundred thirty-six".