1056665555 has 16 divisors (see below), whose sum is σ = 1387260000. Its totient is φ = 766268160.

The previous prime is 1056665551. The next prime is 1056665569. The reversal of 1056665555 is 5555666501.

It is not a de Polignac number, because 1056665555 - 2² = 1056665551 is a prime.

It is a super-2 number, since 2×1056665555² = 2233084190246916050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1056665551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8330 + ... + 46719.

It is an arithmetic number, because the mean of its divisors is an integer number (86703750).

Almost surely, 2^1056665555 is an apocalyptic number.

1056665555 is a deficient number, since it is larger than the sum of its proper divisors (330594445).

1056665555 is a wasteful number, since it uses less digits than its factorization.

1056665555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55414.

The product of its (nonzero) digits is 675000, while the sum is 44.

The square root of 1056665555 is about 32506.3925251634. The cubic root of 1056665555 is about 1018.5425664203.

The spelling of 1056665555 in words is "one billion, fifty-six million, six hundred sixty-five thousand, five hundred fifty-five".