6655616550 has 72 divisors (see below), whose sum is σ = 19507021560. Its totient is φ = 1613481600.

The previous prime is 6655616549. The next prime is 6655616557. The reversal of 6655616550 is 556165566.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6655616496 and 6655616505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6655616557) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 667335 + ... + 677234.

It is an arithmetic number, because the mean of its divisors is an integer number (270930855).

Almost surely, 2^6655616550 is an apocalyptic number.

6655616550 is an abundant number, since it is smaller than the sum of its proper divisors (12851405010).

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

6655616550 is a wasteful number, since it uses less digits than its factorization.

6655616550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344598 (or 1344590 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The square root of 6655616550 is about 81581.9621607620. The cubic root of 6655616550 is about 1881.0316269154.

It can be divided in two parts, 6 and 655616550, that added together give a palindrome (655616556).

The spelling of 6655616550 in words is "six billion, six hundred fifty-five million, six hundred sixteen thousand, five hundred fifty".