670881 has 8 divisors (see below), whose sum is σ = 902880. Its totient is φ = 443072.

The previous prime is 670877. The next prime is 670897. The reversal of 670881 is 188076.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 670881 - 2² = 670877 is a prime.

It is a super-2 number, since 2×670881² = 900162632322, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 670881.

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 in 7 ways as a sum of consecutive naturals, for example, 651 + ... + 1328.

It is an arithmetic number, because the mean of its divisors is an integer number (112860).

2⁶⁷⁰⁸⁸¹ is an apocalyptic number.

It is an amenable number.

670881 is a deficient number, since it is larger than the sum of its proper divisors (231999).

670881 is a wasteful number, since it uses less digits than its factorization.

670881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2095.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 670881 is about 819.0732567970. The cubic root of 670881 is about 87.5417379108.

It can be divided in two parts, 670 and 881, that added together give a palindrome (1551).

The spelling of 670881 in words is "six hundred seventy thousand, eight hundred eighty-one".