667231535232 has 192 divisors, whose sum is σ = 1987463961600. Its totient is φ = 214693742592.

The previous prime is 667231535209. The next prime is 667231535233. The reversal of 667231535232 is 232535132766.

667231535232 is a `hidden beast` number, since 6 + 6 + 72 + 3 + 1 + 53 + 523 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is not an unprimeable number, because it can be changed into a prime (667231535233) 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, 5351619 + ... + 5474877.

It is an arithmetic number, because the mean of its divisors is an integer number (10351374800).

Almost surely, 2^667231535232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667231535232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (993731980800).

667231535232 is an abundant number, since it is smaller than the sum of its proper divisors (1320232426368).

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

667231535232 is a wasteful number, since it uses less digits than its factorization.

667231535232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123443 (or 123428 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 45.

Adding to 667231535232 its reverse (232535132766), we get a palindrome (899766667998).

The spelling of 667231535232 in words is "six hundred sixty-seven billion, two hundred thirty-one million, five hundred thirty-five thousand, two hundred thirty-two".