1066244643 has 24 divisors (see below), whose sum is σ = 1580119632. Its totient is φ = 692610048.

The previous prime is 1066244639. The next prime is 1066244671. The reversal of 1066244643 is 3464426601.

1066244643 is a `hidden beast` number, since 1 + 0 + 6 + 6 + 2 + 4 + 4 + 643 = 666.

It is not a de Polignac number, because 1066244643 - 2² = 1066244639 is a prime.

It is a super-2 number, since 2×1066244643² = 2273755277452394898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1066244598 and 1066244607.

It is not an unprimeable number, because it can be changed into a prime (1066244623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44755 + ... + 64307.

It is an arithmetic number, because the mean of its divisors is an integer number (65838318).

Almost surely, 2^1066244643 is an apocalyptic number.

1066244643 is a deficient number, since it is larger than the sum of its proper divisors (513874989).

1066244643 is a wasteful number, since it uses less digits than its factorization.

1066244643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19715 (or 19712 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 1066244643 is about 32653.4017064073. The cubic root of 1066244643 is about 1021.6111417844.

The spelling of 1066244643 in words is "one billion, sixty-six million, two hundred forty-four thousand, six hundred forty-three".