670668871 has 4 divisors (see below), whose sum is σ = 682036200. Its totient is φ = 659301544.

The previous prime is 670668851. The next prime is 670668883. The reversal of 670668871 is 178866076.

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 670668871 - 2¹⁷ = 670537799 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670668811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5683576 + ... + 5683693.

It is an arithmetic number, because the mean of its divisors is an integer number (170509050).

Almost surely, 2^670668871 is an apocalyptic number.

670668871 is a deficient number, since it is larger than the sum of its proper divisors (11367329).

670668871 is a wasteful number, since it uses less digits than its factorization.

670668871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11367328.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 670668871 is about 25897.2753586164. The cubic root of 670668871 is about 875.3251019433.

The spelling of 670668871 in words is "six hundred seventy million, six hundred sixty-eight thousand, eight hundred seventy-one".