6655666456 has 16 divisors (see below), whose sum is σ = 12481502040. Its totient is φ = 3327265920.

The previous prime is 6655666453. The next prime is 6655666471. The reversal of 6655666456 is 6546665566.

It is a junction number, because it is equal to n+sod(n) for n = 6655666397 and 6655666406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6655666453) 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, 18801 + ... + 116896.

Almost surely, 2^6655666456 is an apocalyptic number.

It is an amenable number.

6655666456 is a deficient number, since it is larger than the sum of its proper divisors (5825835584).

6655666456 is a wasteful number, since it uses less digits than its factorization.

6655666456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141834 (or 141830 counting only the distinct ones).

The product of its digits is 23328000, while the sum is 55.

The square root of 6655666456 is about 81582.2680243691. The cubic root of 6655666456 is about 1881.0363284347.

The spelling of 6655666456 in words is "six billion, six hundred fifty-five million, six hundred sixty-six thousand, four hundred fifty-six".