667212111126 has 48 divisors (see below), whose sum is σ = 1577183416848. Its totient is φ = 202167974400.

The previous prime is 667212111113. The next prime is 667212111127. The reversal of 667212111126 is 621111212766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667212111127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2244190 + ... + 2524046.

It is an arithmetic number, because the mean of its divisors is an integer number (32857987851).

Almost surely, 2^667212111126 is an apocalyptic number.

667212111126 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

667212111126 is an abundant number, since it is smaller than the sum of its proper divisors (909971305722).

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

667212111126 is a wasteful number, since it uses less digits than its factorization.

667212111126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291917 (or 291914 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The spelling of 667212111126 in words is "six hundred sixty-seven billion, two hundred twelve million, one hundred eleven thousand, one hundred twenty-six".