670978945728 has 840 divisors, whose sum is σ = 2533311909744. Its totient is φ = 174008217600.

The previous prime is 670978945709. The next prime is 670978945739. The reversal of 670978945728 is 827549879076.

670978945728 is a `hidden beast` number, since 6 + 7 + 0 + 97 + 89 + 457 + 2 + 8 = 666.

It is a super-2 number, since 2×670978945728² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 201433023 + ... + 201436353.

Almost surely, 2^670978945728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670978945728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1266655954872).

670978945728 is an abundant number, since it is smaller than the sum of its proper divisors (1862332964016).

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

670978945728 is a wasteful number, since it uses less digits than its factorization.

670978945728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3443 (or 3417 counting only the distinct ones).

The product of its (nonzero) digits is 426746880, while the sum is 72.

The spelling of 670978945728 in words is "six hundred seventy billion, nine hundred seventy-eight million, nine hundred forty-five thousand, seven hundred twenty-eight".