667421428206 has 32 divisors (see below), whose sum is σ = 1437555214368. Its totient is φ = 205355848320.

The previous prime is 667421428199. The next prime is 667421428213. The reversal of 667421428206 is 602824124766.

It is an interprime number because it is at equal distance from previous prime (667421428199) and next prime (667421428213).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5502736 + ... + 5622716.

It is an arithmetic number, because the mean of its divisors is an integer number (44923600449).

Almost surely, 2^667421428206 is an apocalyptic number.

667421428206 is an abundant number, since it is smaller than the sum of its proper divisors (770133786162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667421428206 is a wasteful number, since it uses less digits than its factorization.

667421428206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191316.

The product of its (nonzero) digits is 1548288, while the sum is 48.

The spelling of 667421428206 in words is "six hundred sixty-seven billion, four hundred twenty-one million, four hundred twenty-eight thousand, two hundred six".