1566055656 has 48 divisors (see below), whose sum is σ = 4626984960. Its totient is φ = 474562080.

The previous prime is 1566055649. The next prime is 1566055661. The reversal of 1566055656 is 6565506651.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 987880 + ... + 989463.

It is an arithmetic number, because the mean of its divisors is an integer number (96395520).

Almost surely, 2^1566055656 is an apocalyptic number.

It is an amenable number.

1566055656 is an abundant number, since it is smaller than the sum of its proper divisors (3060929304).

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

1566055656 is a wasteful number, since it uses less digits than its factorization.

1566055656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977366 (or 1977359 counting only the distinct ones).

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

The square root of 1566055656 is about 39573.4210803160. The cubic root of 1566055656 is about 1161.2767492099.

It can be divided in two parts, 156605 and 5656, that added together give a palindrome (162261).

The spelling of 1566055656 in words is "one billion, five hundred sixty-six million, fifty-five thousand, six hundred fifty-six".