667210212138 has 16 divisors (see below), whose sum is σ = 1334986604640. Its totient is φ = 222309040656.

The previous prime is 667210212133. The next prime is 667210212161. The reversal of 667210212138 is 831212012766.

It is a junction number, because it is equal to n+sod(n) for n = 667210212096 and 667210212105.

It is not an unprimeable number, because it can be changed into a prime (667210212133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23575528 + ... + 23603811.

It is an arithmetic number, because the mean of its divisors is an integer number (83436662790).

Almost surely, 2^667210212138 is an apocalyptic number.

667210212138 is an abundant number, since it is smaller than the sum of its proper divisors (667776392502).

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

667210212138 is a wasteful number, since it uses less digits than its factorization.

667210212138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47181701.

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 667210212138 in words is "six hundred sixty-seven billion, two hundred ten million, two hundred twelve thousand, one hundred thirty-eight".