671166679 has 16 divisors (see below), whose sum is σ = 698213376. Its totient is φ = 644716800.

The previous prime is 671166667. The next prime is 671166739. The reversal of 671166679 is 976661176.

It is a de Polignac number, because none of the positive numbers 2^k-671166679 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 (671166779) 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 15 ways as a sum of consecutive naturals, for example, 817089 + ... + 817909.

It is an arithmetic number, because the mean of its divisors is an integer number (43638336).

Almost surely, 2^671166679 is an apocalyptic number.

671166679 is a deficient number, since it is larger than the sum of its proper divisors (27046697).

671166679 is a wasteful number, since it uses less digits than its factorization.

671166679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146.

The product of its digits is 571536, while the sum is 49.

The square root of 671166679 is about 25906.8847799190. The cubic root of 671166679 is about 875.5416201539.

The spelling of 671166679 in words is "six hundred seventy-one million, one hundred sixty-six thousand, six hundred seventy-nine".