670778 has 12 divisors (see below), whose sum is σ = 1042650. Its totient is φ = 323640.

The previous prime is 670777. The next prime is 670781. The reversal of 670778 is 877076.

670778 is nontrivially palindromic in base 16.

670778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 508369 + 162409 = 713^2 + 403^2 .

It is not an unprimeable number, because it can be changed into a prime (670777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1748 + ... + 2096.

2⁶⁷⁰⁷⁷⁸ is an apocalyptic number.

670778 is a deficient number, since it is larger than the sum of its proper divisors (371872).

670778 is a wasteful number, since it uses less digits than its factorization.

670778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 670778 is about 819.0103784446. The cubic root of 670778 is about 87.5372576028.

The spelling of 670778 in words is "six hundred seventy thousand, seven hundred seventy-eight".