671744667 has 32 divisors (see below), whose sum is σ = 1004002560. Its totient is φ = 395982720.

The previous prime is 671744629. The next prime is 671744669. The reversal of 671744667 is 766447176.

It is not a de Polignac number, because 671744667 - 2¹² = 671740571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (671744669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 392209 + ... + 393917.

It is an arithmetic number, because the mean of its divisors is an integer number (31375080).

Almost surely, 2^671744667 is an apocalyptic number.

671744667 is a deficient number, since it is larger than the sum of its proper divisors (332257893).

671744667 is a wasteful number, since it uses less digits than its factorization.

671744667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043.

The product of its digits is 1185408, while the sum is 48.

The square root of 671744667 is about 25918.0374835750. The cubic root of 671744667 is about 875.7928778368.

The spelling of 671744667 in words is "six hundred seventy-one million, seven hundred forty-four thousand, six hundred sixty-seven".