667210216236 has 12 divisors (see below), whose sum is σ = 1556823837912. Its totient is φ = 222403405408.

The previous prime is 667210216201. The next prime is 667210216237. The reversal of 667210216236 is 632612012766.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (667210216237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27800425665 + ... + 27800425688.

It is an arithmetic number, because the mean of its divisors is an integer number (129735319826).

Almost surely, 2^667210216236 is an apocalyptic number.

It is an amenable number.

667210216236 is an abundant number, since it is smaller than the sum of its proper divisors (889613621676).

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

667210216236 is a wasteful number, since it uses less digits than its factorization.

667210216236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55600851360 (or 55600851358 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The spelling of 667210216236 in words is "six hundred sixty-seven billion, two hundred ten million, two hundred sixteen thousand, two hundred thirty-six".