1056665215668 has 12 divisors (see below), whose sum is σ = 2465552169920. Its totient is φ = 352221738552.

The previous prime is 1056665215651. The next prime is 1056665215687. The reversal of 1056665215668 is 8665125666501.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1056665215668² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44027717308 + ... + 44027717331.

Almost surely, 2^{1056665215668} is an apocalyptic number.

It is an amenable number.

1056665215668 is an abundant number, since it is smaller than the sum of its proper divisors (1408886954252).

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

1056665215668 is a wasteful number, since it uses less digits than its factorization.

1056665215668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88055434646 (or 88055434644 counting only the distinct ones).

The product of its (nonzero) digits is 15552000, while the sum is 57.

The spelling of 1056665215668 in words is "one trillion, fifty-six billion, six hundred sixty-five million, two hundred fifteen thousand, six hundred sixty-eight".