670816 has 12 divisors (see below), whose sum is σ = 1320732. Its totient is φ = 335392.

The previous prime is 670811. The next prime is 670823. The reversal of 670816 is 618076.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10450 + ... + 10513.

It is an arithmetic number, because the mean of its divisors is an integer number (110061).

2⁶⁷⁰⁸¹⁶ is an apocalyptic number.

It is an amenable number.

670816 is a deficient number, since it is larger than the sum of its proper divisors (649916).

670816 is a wasteful number, since it uses less digits than its factorization.

670816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20973 (or 20965 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 670816 is about 819.0335768453. The cubic root of 670816 is about 87.5389105853.

It can be divided in two parts, 6708 and 16, that added together give a square (6724 = 82²).

The spelling of 670816 in words is "six hundred seventy thousand, eight hundred sixteen".