1165865877 has 12 divisors (see below), whose sum is σ = 1837122144. Its totient is φ = 706585320.

The previous prime is 1165865867. The next prime is 1165865881. The reversal of 1165865877 is 7785685611.

1165865877 is a `hidden beast` number, since 1 + 1 + 6 + 58 + 6 + 587 + 7 = 666.

It is not a de Polignac number, because 1165865877 - 2⁸ = 1165865621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165865867) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5888113 + ... + 5888310.

It is an arithmetic number, because the mean of its divisors is an integer number (153093512).

Almost surely, 2^1165865877 is an apocalyptic number.

It is an amenable number.

1165865877 is a deficient number, since it is larger than the sum of its proper divisors (671256267).

1165865877 is a wasteful number, since it uses less digits than its factorization.

1165865877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11776440 (or 11776437 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 54.

The square root of 1165865877 is about 34144.7781805652. The cubic root of 1165865877 is about 1052.4856837422.

The spelling of 1165865877 in words is "one billion, one hundred sixty-five million, eight hundred sixty-five thousand, eight hundred seventy-seven".