165240477 has 6 divisors (see below), whose sum is σ = 238680702. Its totient is φ = 110160312.

The previous prime is 165240461. The next prime is 165240497. The reversal of 165240477 is 774042561.

165240477 is a `hidden beast` number, since 165 + 24 + 0 + 477 = 666.

It can be written as a sum of positive squares in only one way, i.e., 127712601 + 37527876 = 11301^2 + 6126^2 .

It is not a de Polignac number, because 165240477 - 2⁴ = 165240461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165240407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9180018 + ... + 9180035.

It is an arithmetic number, because the mean of its divisors is an integer number (39780117).

Almost surely, 2^165240477 is an apocalyptic number.

It is an amenable number.

165240477 is a deficient number, since it is larger than the sum of its proper divisors (73440225).

165240477 is a wasteful number, since it uses less digits than its factorization.

165240477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18360059 (or 18360056 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 165240477 is about 12854.5897250749. The cubic root of 165240477 is about 548.7469844497.

The spelling of 165240477 in words is "one hundred sixty-five million, two hundred forty thousand, four hundred seventy-seven".