667212084156 has 12 divisors (see below), whose sum is σ = 1556828196392. Its totient is φ = 222404028048.

The previous prime is 667212084151. The next prime is 667212084179. The reversal of 667212084156 is 651480212766.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667212084151) 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, 27800503495 + ... + 27800503518.

Almost surely, 2^667212084156 is an apocalyptic number.

It is an amenable number.

667212084156 is an abundant number, since it is smaller than the sum of its proper divisors (889616112236).

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

667212084156 is a wasteful number, since it uses less digits than its factorization.

667212084156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55601007020 (or 55601007018 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 667212084156 in words is "six hundred sixty-seven billion, two hundred twelve million, eighty-four thousand, one hundred fifty-six".