670779 has 6 divisors (see below), whose sum is σ = 968916. Its totient is φ = 447180.

The previous prime is 670777. The next prime is 670781. The reversal of 670779 is 977076.

It is an interprime number because it is at equal distance from previous prime (670777) and next prime (670781).

It is not a de Polignac number, because 670779 - 2¹ = 670777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (670777) 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 5 ways as a sum of consecutive naturals, for example, 37257 + ... + 37274.

It is an arithmetic number, because the mean of its divisors is an integer number (161486).

2⁶⁷⁰⁷⁷⁹ is an apocalyptic number.

670779 is a deficient number, since it is larger than the sum of its proper divisors (298137).

670779 is a wasteful number, since it uses less digits than its factorization.

670779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74537 (or 74534 counting only the distinct ones).

The product of its (nonzero) digits is 18522, while the sum is 36.

The square root of 670779 is about 819.0109889373. The cubic root of 670779 is about 87.5373011031.

It can be divided in two parts, 6707 and 79, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 670779 in words is "six hundred seventy thousand, seven hundred seventy-nine".