165865130 has 8 divisors (see below), whose sum is σ = 298557252. Its totient is φ = 66346048.

The previous prime is 165865111. The next prime is 165865151. The reversal of 165865130 is 31568561.

It can be written as a sum of positive squares in 2 ways, for example, as 151019521 + 14845609 = 12289^2 + 3853^2 .

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

It is a super-2 number, since 2×165865130² = 55022482699833800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8293247 + ... + 8293266.

Almost surely, 2^165865130 is an apocalyptic number.

165865130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165865130 is a deficient number, since it is larger than the sum of its proper divisors (132692122).

165865130 is a wasteful number, since it uses less digits than its factorization.

165865130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16586520.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 165865130 is about 12878.8636921120. The cubic root of 165865130 is about 549.4375848651.

The spelling of 165865130 in words is "one hundred sixty-five million, eight hundred sixty-five thousand, one hundred thirty".