1065505566 has 32 divisors (see below), whose sum is σ = 2260178208. Its totient is φ = 333711360.

The previous prime is 1065505547. The next prime is 1065505601. The reversal of 1065505566 is 6655055601.

It is a super-2 number, since 2×1065505566² = 2270604222353960712, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

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, 54006 + ... + 71046.

It is an arithmetic number, because the mean of its divisors is an integer number (70630569).

Almost surely, 2^1065505566 is an apocalyptic number.

1065505566 is an abundant number, since it is smaller than the sum of its proper divisors (1194672642).

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

1065505566 is a wasteful number, since it uses less digits than its factorization.

1065505566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17676.

The product of its (nonzero) digits is 135000, while the sum is 39.

The square root of 1065505566 is about 32642.0827460504. The cubic root of 1065505566 is about 1021.3750409276.

The spelling of 1065505566 in words is "one billion, sixty-five million, five hundred five thousand, five hundred sixty-six".