667556020032 has 224 divisors, whose sum is σ = 2043553204224. Its totient is φ = 190321612800.

The previous prime is 667556020007. The next prime is 667556020091. The reversal of 667556020032 is 230020655766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2850493 + ... + 3075779.

It is an arithmetic number, because the mean of its divisors is an integer number (9123005376).

Almost surely, 2^667556020032 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 667556020032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1021776602112).

667556020032 is an abundant number, since it is smaller than the sum of its proper divisors (1375997184192).

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

667556020032 is a wasteful number, since it uses less digits than its factorization.

667556020032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225397 (or 225387 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 42.

Adding to 667556020032 its reverse (230020655766), we get a palindrome (897576675798).

The spelling of 667556020032 in words is "six hundred sixty-seven billion, five hundred fifty-six million, twenty thousand, thirty-two".