165478011 has 8 divisors (see below), whose sum is σ = 232249920. Its totient is φ = 104512392.

The previous prime is 165478003. The next prime is 165478037. The reversal of 165478011 is 110874561.

It is a happy number.

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

It is not a de Polignac number, because 165478011 - 2³ = 165478003 is a prime.

It is a super-2 number, since 2×165478011² = 54765944249032242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (165478111) 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, 1451505 + ... + 1451618.

It is an arithmetic number, because the mean of its divisors is an integer number (29031240).

Almost surely, 2^165478011 is an apocalyptic number.

165478011 is a deficient number, since it is larger than the sum of its proper divisors (66771909).

165478011 is a wasteful number, since it uses less digits than its factorization.

165478011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2903145.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 165478011 is about 12863.8256751248. The cubic root of 165478011 is about 549.0098007215.

The spelling of 165478011 in words is "one hundred sixty-five million, four hundred seventy-eight thousand, eleven".