165278047 has 8 divisors (see below), whose sum is σ = 186521040. Its totient is φ = 145071360.

The previous prime is 165278027. The next prime is 165278051. The reversal of 165278047 is 740872561.

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

It is a cyclic number.

It is not a de Polignac number, because 165278047 - 2⁷ = 165277919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165278027) 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, 258738 + ... + 259375.

It is an arithmetic number, because the mean of its divisors is an integer number (23315130).

Almost surely, 2^165278047 is an apocalyptic number.

165278047 is a deficient number, since it is larger than the sum of its proper divisors (21242993).

165278047 is a wasteful number, since it uses less digits than its factorization.

165278047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518153.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 165278047 is about 12856.0509877645. The cubic root of 165278047 is about 548.7885700271.

The spelling of 165278047 in words is "one hundred sixty-five million, two hundred seventy-eight thousand, forty-seven".