165670533 has 24 divisors (see below), whose sum is σ = 282921600. Its totient is φ = 91403424.

The previous prime is 165670501. The next prime is 165670537. The reversal of 165670533 is 335076561.

It is a happy number.

165670533 is a `hidden beast` number, since 1 + 6 + 56 + 70 + 533 = 666.

It is not a de Polignac number, because 165670533 - 2⁵ = 165670501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165670537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43513 + ... + 47166.

It is an arithmetic number, because the mean of its divisors is an integer number (11788400).

Almost surely, 2^165670533 is an apocalyptic number.

It is an amenable number.

165670533 is a deficient number, since it is larger than the sum of its proper divisors (117251067).

165670533 is a wasteful number, since it uses less digits than its factorization.

165670533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90721 (or 90718 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 36.

The square root of 165670533 is about 12871.3065770341. The cubic root of 165670533 is about 549.2226296055. Note that the first 3 decimals are identical.

The spelling of 165670533 in words is "one hundred sixty-five million, six hundred seventy thousand, five hundred thirty-three".