165648077 has 16 divisors (see below), whose sum is σ = 197904000. Its totient is φ = 138509280.

The previous prime is 165648073. The next prime is 165648089. The reversal of 165648077 is 770846561.

It is not a de Polignac number, because 165648077 - 2² = 165648073 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165648071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8174 + ... + 19952.

It is an arithmetic number, because the mean of its divisors is an integer number (12369000).

Almost surely, 2^165648077 is an apocalyptic number.

It is an amenable number.

165648077 is a deficient number, since it is larger than the sum of its proper divisors (32255923).

165648077 is an equidigital number, since it uses as much as digits as its factorization.

165648077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11841 (or 11827 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 165648077 is about 12870.4342195592. The cubic root of 165648077 is about 549.1978134831.

The spelling of 165648077 in words is "one hundred sixty-five million, six hundred forty-eight thousand, seventy-seven".