6667034221 has 4 divisors (see below), whose sum is σ = 6717927744. Its totient is φ = 6616140700.

The previous prime is 6667034147. The next prime is 6667034237. The reversal of 6667034221 is 1224307666.

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 a de Polignac number, because none of the positive numbers 2^k-6667034221 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 (6667034021) 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, 25446565 + ... + 25446826.

It is an arithmetic number, because the mean of its divisors is an integer number (1679481936).

Almost surely, 2^6667034221 is an apocalyptic number.

It is an amenable number.

6667034221 is a deficient number, since it is larger than the sum of its proper divisors (50893523).

6667034221 is a wasteful number, since it uses less digits than its factorization.

6667034221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50893522.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 6667034221 is about 81651.9088631736. The cubic root of 6667034221 is about 1882.1066453134.

The spelling of 6667034221 in words is "six billion, six hundred sixty-seven million, thirty-four thousand, two hundred twenty-one".