670744064656 has 20 divisors (see below), whose sum is σ = 1309799437312. Its totient is φ = 332731306656.

The previous prime is 670744064651. The next prime is 670744064659. The reversal of 670744064656 is 656460447076.

It is a junction number, because it is equal to n+sod(n) for n = 670744064597 and 670744064606.

It is not an unprimeable number, because it can be changed into a prime (670744064651) 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, 165043260 + ... + 165047323.

Almost surely, 2^670744064656 is an apocalyptic number.

It is an amenable number.

670744064656 is a deficient number, since it is larger than the sum of its proper divisors (639055372656).

670744064656 is a wasteful number, since it uses less digits than its factorization.

670744064656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330090718 (or 330090712 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 55.

The spelling of 670744064656 in words is "six hundred seventy billion, seven hundred forty-four million, sixty-four thousand, six hundred fifty-six".