670279679 has 4 divisors (see below), whose sum is σ = 688395384. Its totient is φ = 652163976.

The previous prime is 670279669. The next prime is 670279681. The reversal of 670279679 is 976972076.

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 670279679 - 2¹⁶ = 670214143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 670279679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670279609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9057797 + ... + 9057870.

It is an arithmetic number, because the mean of its divisors is an integer number (172098846).

Almost surely, 2^670279679 is an apocalyptic number.

670279679 is a deficient number, since it is larger than the sum of its proper divisors (18115705).

670279679 is a wasteful number, since it uses less digits than its factorization.

670279679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18115704.

The product of its (nonzero) digits is 2000376, while the sum is 53.

The square root of 670279679 is about 25889.7601186261. The cubic root of 670279679 is about 875.1557508868.

The spelling of 670279679 in words is "six hundred seventy million, two hundred seventy-nine thousand, six hundred seventy-nine".