1165665137 has 16 divisors (see below), whose sum is σ = 1469661312. Its totient is φ = 899786880.

The previous prime is 1165665119. The next prime is 1165665167. The reversal of 1165665137 is 7315665611.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1165665137 - 2⁶ = 1165665073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a junction number, because it is equal to n+sod(n) for n = 1165665094 and 1165665103.

It is not an unprimeable number, because it can be changed into a prime (1165665167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152483 + ... + 159944.

It is an arithmetic number, because the mean of its divisors is an integer number (91853832).

Almost surely, 2^1165665137 is an apocalyptic number.

It is an amenable number.

1165665137 is a deficient number, since it is larger than the sum of its proper divisors (303996175).

1165665137 is a wasteful number, since it uses less digits than its factorization.

1165665137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312488.

The product of its digits is 113400, while the sum is 41.

The square root of 1165665137 is about 34141.8385123004. The cubic root of 1165665137 is about 1052.4252742482.

The spelling of 1165665137 in words is "one billion, one hundred sixty-five million, six hundred sixty-five thousand, one hundred thirty-seven".