667741371552 has 144 divisors (see below), whose sum is σ = 1951018884360. Its totient is φ = 216475047936.

The previous prime is 667741371529. The next prime is 667741371569. The reversal of 667741371552 is 255173147766.

667741371552 is a `hidden beast` number, since 6 + 6 + 7 + 7 + 4 + 13 + 71 + 552 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 624359146896 + 43382224656 = 790164^2 + 208284^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×667741371552² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28684974 + ... + 28708242.

Almost surely, 2^667741371552 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 667741371552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (975509442180).

667741371552 is an abundant number, since it is smaller than the sum of its proper divisors (1283277512808).

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

667741371552 is a wasteful number, since it uses less digits than its factorization.

667741371552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26015 (or 26004 counting only the distinct ones).

The product of its digits is 7408800, while the sum is 54.

The spelling of 667741371552 in words is "six hundred sixty-seven billion, seven hundred forty-one million, three hundred seventy-one thousand, five hundred fifty-two".