165036787 has 4 divisors (see below), whose sum is σ = 168548256. Its totient is φ = 161525320.

The previous prime is 165036779. The next prime is 165036803. The reversal of 165036787 is 787630561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 787630561 = 23 ⋅34244807.

It is a cyclic number.

It is not a de Polignac number, because 165036787 - 2³ = 165036779 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165036757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1755664 + ... + 1755757.

It is an arithmetic number, because the mean of its divisors is an integer number (42137064).

Almost surely, 2^165036787 is an apocalyptic number.

165036787 is a deficient number, since it is larger than the sum of its proper divisors (3511469).

165036787 is an equidigital number, since it uses as much as digits as its factorization.

165036787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3511468.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 165036787 is about 12846.6644308941. The cubic root of 165036787 is about 548.5214137454.

The spelling of 165036787 in words is "one hundred sixty-five million, thirty-six thousand, seven hundred eighty-seven".