670799 has 4 divisors (see below), whose sum is σ = 693960. Its totient is φ = 647640.

The previous prime is 670781. The next prime is 670811. The reversal of 670799 is 997076.

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

It is a cyclic number.

It is not a de Polignac number, because 670799 - 2⁸ = 670543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11537 + ... + 11594.

It is an arithmetic number, because the mean of its divisors is an integer number (173490).

2⁶⁷⁰⁷⁹⁹ is an apocalyptic number.

670799 is a deficient number, since it is larger than the sum of its proper divisors (23161).

670799 is a wasteful number, since it uses less digits than its factorization.

670799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23160.

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 670799 is about 819.0231986946. The cubic root of 670799 is about 87.5381711009.

Subtracting from 670799 its sum of digits (38), we obtain a square (670761 = 819²).

The spelling of 670799 in words is "six hundred seventy thousand, seven hundred ninety-nine".