1655666056 has 64 divisors (see below), whose sum is σ = 3440465280. Its totient is φ = 740705280.

The previous prime is 1655666053. The next prime is 1655666093. The reversal of 1655666056 is 6506665561.

It is a junction number, because it is equal to n+sod(n) for n = 1655665997 and 1655666015.

It is not an unprimeable number, because it can be changed into a prime (1655666053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1660150 + ... + 1661146.

It is an arithmetic number, because the mean of its divisors is an integer number (53757270).

Almost surely, 2^1655666056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1655666056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1720232640).

1655666056 is an abundant number, since it is smaller than the sum of its proper divisors (1784799224).

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

1655666056 is a wasteful number, since it uses less digits than its factorization.

1655666056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294 (or 1290 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 46.

The square root of 1655666056 is about 40689.8765788249. The cubic root of 1655666056 is about 1183.0168080391.

The spelling of 1655666056 in words is "one billion, six hundred fifty-five million, six hundred sixty-six thousand, fifty-six".