1065861665 has 16 divisors (see below), whose sum is σ = 1477388160. Its totient is φ = 729573120.

The previous prime is 1065861637. The next prime is 1065861689. The reversal of 1065861665 is 5661685601.

1065861665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1065861665 - 2⁸ = 1065861409 is a prime.

It is a super-2 number, since 2×1065861665² = 2272122177833144450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 569045 + ... + 570914.

It is an arithmetic number, because the mean of its divisors is an integer number (92336760).

Almost surely, 2^1065861665 is an apocalyptic number.

It is an amenable number.

1065861665 is a deficient number, since it is larger than the sum of its proper divisors (411526495).

1065861665 is a wasteful number, since it uses less digits than its factorization.

1065861665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139992.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 1065861665 is about 32647.5368902464. The cubic root of 1065861665 is about 1021.4888116832.

The spelling of 1065861665 in words is "one billion, sixty-five million, eight hundred sixty-one thousand, six hundred sixty-five".