667405435128 has 32 divisors (see below), whose sum is σ = 1668533717760. Its totient is φ = 222465794400.

The previous prime is 667405435069. The next prime is 667405435129. The reversal of 667405435128 is 821534504766.

667405435128 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (667405435129) 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, 3496251 + ... + 3682197.

It is an arithmetic number, because the mean of its divisors is an integer number (52141678680).

Almost surely, 2^667405435128 is an apocalyptic number.

It is an amenable number.

667405435128 is an abundant number, since it is smaller than the sum of its proper divisors (1001128282632).

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

667405435128 is a wasteful number, since it uses less digits than its factorization.

667405435128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335507 (or 335503 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 51.

The spelling of 667405435128 in words is "six hundred sixty-seven billion, four hundred five million, four hundred thirty-five thousand, one hundred twenty-eight".