667879441 has 4 divisors (see below), whose sum is σ = 671376384. Its totient is φ = 664382500.

The previous prime is 667879439. The next prime is 667879453. The reversal of 667879441 is 144978766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 667879441 - 2¹ = 667879439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667879481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1748185 + ... + 1748566.

It is an arithmetic number, because the mean of its divisors is an integer number (167844096).

Almost surely, 2^667879441 is an apocalyptic number.

It is an amenable number.

667879441 is a deficient number, since it is larger than the sum of its proper divisors (3496943).

667879441 is a wasteful number, since it uses less digits than its factorization.

667879441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3496942.

The product of its digits is 2032128, while the sum is 52.

The square root of 667879441 is about 25843.3635775222. The cubic root of 667879441 is about 874.1098718232.

The spelling of 667879441 in words is "six hundred sixty-seven million, eight hundred seventy-nine thousand, four hundred forty-one".