667671367 has 4 divisors (see below), whose sum is σ = 728368776. Its totient is φ = 606973960.

The previous prime is 667671353. The next prime is 667671373. The reversal of 667671367 is 763176766.

It is a happy number.

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 667671367 - 2¹¹ = 667669319 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 self number, because there is not a number n which added to its sum of digits gives 667671367.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667671337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30348688 + ... + 30348709.

It is an arithmetic number, because the mean of its divisors is an integer number (182092194).

Almost surely, 2^667671367 is an apocalyptic number.

667671367 is a deficient number, since it is larger than the sum of its proper divisors (60697409).

667671367 is a wasteful number, since it uses less digits than its factorization.

667671367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60697408.

The product of its digits is 1333584, while the sum is 49.

The square root of 667671367 is about 25839.3375882587. The cubic root of 667671367 is about 874.0190877597.

The spelling of 667671367 in words is "six hundred sixty-seven million, six hundred seventy-one thousand, three hundred sixty-seven".