670555 has 8 divisors (see below), whose sum is σ = 824544. Its totient is φ = 523200.

The previous prime is 670543. The next prime is 670559. The reversal of 670555 is 555076.

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

It is not a de Polignac number, because 670555 - 2¹⁵ = 637787 is a prime.

It is an Ulam number.

It is a Duffinian number.

670555 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (670559) 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, 1431 + ... + 1840.

It is an arithmetic number, because the mean of its divisors is an integer number (103068).

2⁶⁷⁰⁵⁵⁵ is an apocalyptic number.

670555 is a deficient number, since it is larger than the sum of its proper divisors (153989).

670555 is a wasteful number, since it uses less digits than its factorization.

670555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3317.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 670555 is about 818.8742272169. The cubic root of 670555 is about 87.5275559469.

It can be divided in two parts, 670 and 555, that added together give a triangular number (1225 = T₄₉).

The spelling of 670555 in words is "six hundred seventy thousand, five hundred fifty-five".