1056660643 has 2 divisors, whose sum is σ = 1056660644. Its totient is φ = 1056660642.

The previous prime is 1056660557. The next prime is 1056660659. The reversal of 1056660643 is 3460666501.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1056660643 - 2¹⁷ = 1056529571 is a prime.

It is a super-2 number, since 2×1056660643² = 2233063428930346898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1056160643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528330321 + 528330322.

It is an arithmetic number, because the mean of its divisors is an integer number (528330322).

Almost surely, 2^1056660643 is an apocalyptic number.

1056660643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056660643 is an equidigital number, since it uses as much as digits as its factorization.

1056660643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 1056660643 is about 32506.3169707059. The cubic root of 1056660643 is about 1018.5409881572.

The spelling of 1056660643 in words is "one billion, fifty-six million, six hundred sixty thousand, six hundred forty-three".