165256730 has 8 divisors (see below), whose sum is σ = 297462132. Its totient is φ = 66102688.

The previous prime is 165256723. The next prime is 165256739. The reversal of 165256730 is 37652561.

It can be written as a sum of positive squares in 2 ways, for example, as 165199609 + 57121 = 12853^2 + 239^2 .

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

It is not an unprimeable number, because it can be changed into a prime (165256739) 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, 8262827 + ... + 8262846.

Almost surely, 2^165256730 is an apocalyptic number.

165256730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165256730 is a deficient number, since it is larger than the sum of its proper divisors (132205402).

165256730 is a wasteful number, since it uses less digits than its factorization.

165256730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16525680.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 165256730 is about 12855.2218961790. The cubic root of 165256730 is about 548.7649753853.

The spelling of 165256730 in words is "one hundred sixty-five million, two hundred fifty-six thousand, seven hundred thirty".