6664540651106 has 8 divisors (see below), whose sum is σ = 10765796436444. Its totient is φ = 3075941838960.

The previous prime is 6664540651103. The next prime is 6664540651123. The reversal of 6664540651106 is 6011560454666.

It can be written as a sum of positive squares in 2 ways, for example, as 6189969841225 + 474570809881 = 2487965^2 + 688891^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×6664540651106² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6664540651103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128164243265 + ... + 128164243316.

Almost surely, 2^{6664540651106} is an apocalyptic number.

6664540651106 is a deficient number, since it is larger than the sum of its proper divisors (4101255785338).

6664540651106 is a wasteful number, since it uses less digits than its factorization.

6664540651106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256328486596.

The product of its (nonzero) digits is 3110400, while the sum is 50.

The spelling of 6664540651106 in words is "six trillion, six hundred sixty-four billion, five hundred forty million, six hundred fifty-one thousand, one hundred six".