670785 has 16 divisors (see below), whose sum is σ = 1083456. Its totient is φ = 354368.

The previous prime is 670781. The next prime is 670811. The reversal of 670785 is 587076.

It is a cyclic number.

It is not a de Polignac number, because 670785 - 2² = 670781 is a prime.

It is an alternating number because its digits alternate between even and odd.

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 15 ways as a sum of consecutive naturals, for example, 2842 + ... + 3068.

It is an arithmetic number, because the mean of its divisors is an integer number (67716).

2⁶⁷⁰⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

670785 is a deficient number, since it is larger than the sum of its proper divisors (412671).

670785 is a wasteful number, since it uses less digits than its factorization.

670785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 670785 is about 819.0146518836. The cubic root of 670785 is about 87.5375621043.

The spelling of 670785 in words is "six hundred seventy thousand, seven hundred eighty-five".