165966027 has 4 divisors (see below), whose sum is σ = 221288040. Its totient is φ = 110644016.

The previous prime is 165966023. The next prime is 165966029. The reversal of 165966027 is 720669561.

165966027 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165966027 - 2² = 165966023 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165966027.

It is not an unprimeable number, because it can be changed into a prime (165966023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27661002 + ... + 27661007.

It is an arithmetic number, because the mean of its divisors is an integer number (55322010).

Almost surely, 2^165966027 is an apocalyptic number.

165966027 is a deficient number, since it is larger than the sum of its proper divisors (55322013).

165966027 is an equidigital number, since it uses as much as digits as its factorization.

165966027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55322012.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 165966027 is about 12882.7802511725. The cubic root of 165966027 is about 549.5489712808.

The spelling of 165966027 in words is "one hundred sixty-five million, nine hundred sixty-six thousand, twenty-seven".