6655560646 has 16 divisors (see below), whose sum is σ = 11905599744. Its totient is φ = 2728366344.

The previous prime is 6655560617. The next prime is 6655560647. The reversal of 6655560646 is 6460655566.

It is a self number, because there is not a number n which added to its sum of digits gives 6655560646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6655560647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10334400 + ... + 10335043.

It is an arithmetic number, because the mean of its divisors is an integer number (744099984).

Almost surely, 2^6655560646 is an apocalyptic number.

6655560646 is a deficient number, since it is larger than the sum of its proper divisors (5250039098).

6655560646 is a wasteful number, since it uses less digits than its factorization.

6655560646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20669475.

The product of its (nonzero) digits is 3888000, while the sum is 49.

The square root of 6655560646 is about 81581.6195352850. The cubic root of 6655560646 is about 1881.0263603116.

The spelling of 6655560646 in words is "six billion, six hundred fifty-five million, five hundred sixty thousand, six hundred forty-six".