165040406 has 8 divisors (see below), whose sum is σ = 252828000. Its totient is φ = 80764408.

The previous prime is 165040391. The next prime is 165040411. The reversal of 165040406 is 604040561.

It is a happy number.

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

It is a super-2 number, since 2×165040406² = 54476671225289672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 877781 + ... + 877968.

It is an arithmetic number, because the mean of its divisors is an integer number (31603500).

Almost surely, 2^165040406 is an apocalyptic number.

165040406 is a deficient number, since it is larger than the sum of its proper divisors (87787594).

165040406 is a wasteful number, since it uses less digits than its factorization.

165040406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755798.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 165040406 is about 12846.8052838050. The cubic root of 165040406 is about 548.5254231232.

Adding to 165040406 its reverse (604040561), we get a palindrome (769080967).

The spelling of 165040406 in words is "one hundred sixty-five million, forty thousand, four hundred six".