1065665340 has 36 divisors (see below), whose sum is σ = 3232518744. Its totient is φ = 284177376.

The previous prime is 1065665333. The next prime is 1065665387. The reversal of 1065665340 is 435665601.

1065665340 is a `hidden beast` number, since 1 + 0 + 6 + 566 + 53 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1065665340² = 2271285233754631200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1065665295 and 1065665304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2960002 + ... + 2960361.

Almost surely, 2^1065665340 is an apocalyptic number.

1065665340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1065665340 is an abundant number, since it is smaller than the sum of its proper divisors (2166853404).

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

1065665340 is a wasteful number, since it uses less digits than its factorization.

1065665340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5920378 (or 5920373 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 1065665340 is about 32644.5300165280. The cubic root of 1065665340 is about 1021.4260905654.

The spelling of 1065665340 in words is "one billion, sixty-five million, six hundred sixty-five thousand, three hundred forty".