6655666540506 has 16 divisors (see below), whose sum is σ = 14011929559200. Its totient is φ = 2101789433808.

The previous prime is 6655666540499. The next prime is 6655666540511. The reversal of 6655666540506 is 6050456665566.

It is a super-2 number, since 2×6655666540506² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6655666540506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29191519801 + ... + 29191520028.

It is an arithmetic number, because the mean of its divisors is an integer number (875745597450).

Almost surely, 2^{6655666540506} is an apocalyptic number.

6655666540506 is an abundant number, since it is smaller than the sum of its proper divisors (7356263018694).

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

6655666540506 is a wasteful number, since it uses less digits than its factorization.

6655666540506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58383039853.

The product of its (nonzero) digits is 116640000, while the sum is 60.

The spelling of 6655666540506 in words is "six trillion, six hundred fifty-five billion, six hundred sixty-six million, five hundred forty thousand, five hundred six".