667542195312 has 20 divisors (see below), whose sum is σ = 1724484004680. Its totient is φ = 222514065088.

The previous prime is 667542195311. The next prime is 667542195329. The reversal of 667542195312 is 213591245766.

667542195312 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×667542195312² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667542195311) 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, 6953564487 + ... + 6953564582.

It is an arithmetic number, because the mean of its divisors is an integer number (86224200234).

Almost surely, 2^667542195312 is an apocalyptic number.

It is an amenable number.

667542195312 is an abundant number, since it is smaller than the sum of its proper divisors (1056941809368).

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

667542195312 is a wasteful number, since it uses less digits than its factorization.

667542195312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13907129080 (or 13907129074 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 51.

The spelling of 667542195312 in words is "six hundred sixty-seven billion, five hundred forty-two million, one hundred ninety-five thousand, three hundred twelve".