670857 has 16 divisors (see below), whose sum is σ = 1010880. Its totient is φ = 392000.

The previous prime is 670853. The next prime is 670867. The reversal of 670857 is 758076.

It is a cyclic number.

It is not a de Polignac number, because 670857 - 2² = 670853 is a prime.

It is a super-2 number, since 2×670857² = 900098228898, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (670853) 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, 607 + ... + 1307.

It is an arithmetic number, because the mean of its divisors is an integer number (63180).

2⁶⁷⁰⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

670857 is a deficient number, since it is larger than the sum of its proper divisors (340023).

670857 is a wasteful number, since it uses less digits than its factorization.

670857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744.

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

The square root of 670857 is about 819.0586059617. The cubic root of 670857 is about 87.5406939965.

The spelling of 670857 in words is "six hundred seventy thousand, eight hundred fifty-seven".