670790 has 8 divisors (see below), whose sum is σ = 1207440. Its totient is φ = 268312.

The previous prime is 670781. The next prime is 670811. The reversal of 670790 is 97076.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33530 + ... + 33549.

It is an arithmetic number, because the mean of its divisors is an integer number (150930).

2⁶⁷⁰⁷⁹⁰ is an apocalyptic number.

670790 is a deficient number, since it is larger than the sum of its proper divisors (536650).

670790 is a wasteful number, since it uses less digits than its factorization.

670790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67086.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 670790 is about 819.0177043263. The cubic root of 670790 is about 87.5377796040.

Subtracting from 670790 its sum of digits (29), we obtain a square (670761 = 819²).

The spelling of 670790 in words is "six hundred seventy thousand, seven hundred ninety".