1065665644 has 12 divisors (see below), whose sum is σ = 1882344744. Its totient is φ = 527852864.

The previous prime is 1065665633. The next prime is 1065665651. The reversal of 1065665644 is 4465665601.

1065665644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1065665644² = 2271286529603869472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1065665644.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1244509 + ... + 1245364.

It is an arithmetic number, because the mean of its divisors is an integer number (156862062).

Almost surely, 2^1065665644 is an apocalyptic number.

It is an amenable number.

1065665644 is a deficient number, since it is larger than the sum of its proper divisors (816679100).

1065665644 is a wasteful number, since it uses less digits than its factorization.

1065665644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2489984 (or 2489982 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 43.

The square root of 1065665644 is about 32644.5346727442. The cubic root of 1065665644 is about 1021.4261876921.

Subtracting from 1065665644 its sum of digits (43), we obtain a palindrome (1065665601).

The spelling of 1065665644 in words is "one billion, sixty-five million, six hundred sixty-five thousand, six hundred forty-four".