165665511148 has 6 divisors (see below), whose sum is σ = 289914644516. Its totient is φ = 82832755572.

The previous prime is 165665511101. The next prime is 165665511149. The reversal of 165665511148 is 841115566561.

It is a super-2 number, since 2×165665511148² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165665511149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20708188890 + ... + 20708188897.

Almost surely, 2^165665511148 is an apocalyptic number.

It is an amenable number.

165665511148 is a deficient number, since it is larger than the sum of its proper divisors (124249133368).

165665511148 is a wasteful number, since it uses less digits than its factorization.

165665511148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41416377791 (or 41416377789 counting only the distinct ones).

The product of its digits is 864000, while the sum is 49.

The spelling of 165665511148 in words is "one hundred sixty-five billion, six hundred sixty-five million, five hundred eleven thousand, one hundred forty-eight".