670780 has 24 divisors (see below), whose sum is σ = 1537200. Its totient is φ = 243840.

The previous prime is 670777. The next prime is 670781. The reversal of 670780 is 87076.

670780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

670780 is an esthetic number in base 9, because in such base its adjacent digits differ by 1.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670781) 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, 1305 + ... + 1744.

It is an arithmetic number, because the mean of its divisors is an integer number (64050).

2⁶⁷⁰⁷⁸⁰ is an apocalyptic number.

It is an amenable number.

670780 is an abundant number, since it is smaller than the sum of its proper divisors (866420).

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

670780 is a wasteful number, since it uses less digits than its factorization.

670780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3069 (or 3067 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 670780 is about 819.0115994295. The cubic root of 670780 is about 87.5373446034.

The spelling of 670780 in words is "six hundred seventy thousand, seven hundred eighty".