667041228680 has 64 divisors (see below), whose sum is σ = 1529503138800. Its totient is φ = 261723571200.

The previous prime is 667041228641. The next prime is 667041228697. The reversal of 667041228680 is 86822140766.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 383406163204 + 283635065476 = 619198^2 + 532574^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10119830 + ... + 10185530.

Almost surely, 2^667041228680 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 667041228680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (764751569400).

667041228680 is an abundant number, since it is smaller than the sum of its proper divisors (862461910120).

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

667041228680 is a wasteful number, since it uses less digits than its factorization.

667041228680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70554 (or 70550 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 50.

The spelling of 667041228680 in words is "six hundred sixty-seven billion, forty-one million, two hundred twenty-eight thousand, six hundred eighty".