6601655666506 has 48 divisors (see below), whose sum is σ = 10271197460160. Its totient is φ = 3180400151040.

The previous prime is 6601655666483. The next prime is 6601655666513. The reversal of 6601655666506 is 6056665561066.

It is a super-2 number, since 2×6601655666506² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 296306275 + ... + 296328553.

It is an arithmetic number, because the mean of its divisors is an integer number (213983280420).

Almost surely, 2^{6601655666506} is an apocalyptic number.

6601655666506 is a deficient number, since it is larger than the sum of its proper divisors (3669541793654).

6601655666506 is a wasteful number, since it uses less digits than its factorization.

6601655666506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22831 (or 22718 counting only the distinct ones).

The product of its (nonzero) digits is 34992000, while the sum is 58.

The spelling of 6601655666506 in words is "six trillion, six hundred one billion, six hundred fifty-five million, six hundred sixty-six thousand, five hundred six".