670081 has 4 divisors (see below), whose sum is σ = 677700. Its totient is φ = 662464.

The previous prime is 670051. The next prime is 670097. The reversal of 670081 is 180076.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 173056 + 497025 = 416^2 + 705^2 .

It is a cyclic number.

It is not a de Polignac number, because 670081 - 2⁵ = 670049 is a prime.

It is a super-2 number, since 2×670081² = 898017093122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3676 + ... + 3853.

It is an arithmetic number, because the mean of its divisors is an integer number (169425).

2⁶⁷⁰⁰⁸¹ is an apocalyptic number.

It is an amenable number.

670081 is a deficient number, since it is larger than the sum of its proper divisors (7619).

670081 is an equidigital number, since it uses as much as digits as its factorization.

670081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7618.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 670081 is about 818.5847543169. The cubic root of 670081 is about 87.5069273427.

The spelling of 670081 in words is "six hundred seventy thousand, eighty-one".