165787085 has 8 divisors (see below), whose sum is σ = 200280600. Its totient is φ = 131738944.

The previous prime is 165787073. The next prime is 165787087. The reversal of 165787085 is 580787561.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10510564 + 155276521 = 3242^2 + 12461^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165787085 - 2¹⁴ = 165770701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165787087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110522 + ... + 112011.

It is an arithmetic number, because the mean of its divisors is an integer number (25035075).

Almost surely, 2^165787085 is an apocalyptic number.

It is an amenable number.

165787085 is a deficient number, since it is larger than the sum of its proper divisors (34493515).

165787085 is a wasteful number, since it uses less digits than its factorization.

165787085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222687.

The product of its (nonzero) digits is 470400, while the sum is 47.

The square root of 165787085 is about 12875.8333710871. The cubic root of 165787085 is about 549.3513951927.

The spelling of 165787085 in words is "one hundred sixty-five million, seven hundred eighty-seven thousand, eighty-five".