165641027 has 2 divisors, whose sum is σ = 165641028. Its totient is φ = 165641026.

The previous prime is 165641023. The next prime is 165641057. The reversal of 165641027 is 720146561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165641027 - 2² = 165641023 is a prime.

It is a super-2 number, since 2×165641027² = 54873899651229458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165640984 and 165641002.

It is not a weakly prime, because it can be changed into another prime (165641023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82820513 + 82820514.

It is an arithmetic number, because the mean of its divisors is an integer number (82820514).

Almost surely, 2^165641027 is an apocalyptic number.

165641027 is a deficient number, since it is larger than the sum of its proper divisors (1).

165641027 is an equidigital number, since it uses as much as digits as its factorization.

165641027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 165641027 is about 12870.1603331116. The cubic root of 165641027 is about 549.1900220665.

Adding to 165641027 its reverse (720146561), we get a palindrome (885787588).

The spelling of 165641027 in words is "one hundred sixty-five million, six hundred forty-one thousand, twenty-seven".