165401366 has 16 divisors (see below), whose sum is σ = 272873664. Its totient is φ = 74714304.

The previous prime is 165401363. The next prime is 165401389. The reversal of 165401366 is 663104561.

It is a super-2 number, since 2×165401366² = 54715223749331912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165401363) 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, 66455 + ... + 68898.

It is an arithmetic number, because the mean of its divisors is an integer number (17054604).

Almost surely, 2^165401366 is an apocalyptic number.

165401366 is a deficient number, since it is larger than the sum of its proper divisors (107472298).

165401366 is a wasteful number, since it uses less digits than its factorization.

165401366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135415.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 165401366 is about 12860.8462396531. The cubic root of 165401366 is about 548.9250254006.

The spelling of 165401366 in words is "one hundred sixty-five million, four hundred one thousand, three hundred sixty-six".