165040651 has 4 divisors (see below), whose sum is σ = 165076704. Its totient is φ = 165004600.

The previous prime is 165040649. The next prime is 165040693. The reversal of 165040651 is 156040561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165040651 - 2¹ = 165040649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165040151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9955 + ... + 20716.

It is an arithmetic number, because the mean of its divisors is an integer number (41269176).

Almost surely, 2^165040651 is an apocalyptic number.

165040651 is a deficient number, since it is larger than the sum of its proper divisors (36053).

165040651 is an equidigital number, since it uses as much as digits as its factorization.

165040651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36052.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 165040651 is about 12846.8148192461. The cubic root of 165040651 is about 548.5256945490.

The spelling of 165040651 in words is "one hundred sixty-five million, forty thousand, six hundred fifty-one".