165144668 has 12 divisors (see below), whose sum is σ = 311234280. Its totient is φ = 76220592.

The previous prime is 165144659. The next prime is 165144671. The reversal of 165144668 is 866441561.

It is a super-2 number, since 2×165144668² = 54545522737660448, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1587878 + ... + 1587981.

It is an arithmetic number, because the mean of its divisors is an integer number (25936190).

Almost surely, 2^165144668 is an apocalyptic number.

It is an amenable number.

165144668 is a deficient number, since it is larger than the sum of its proper divisors (146089612).

165144668 is a wasteful number, since it uses less digits than its factorization.

165144668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3175876 (or 3175874 counting only the distinct ones).

The product of its digits is 138240, while the sum is 41.

The square root of 165144668 is about 12850.8625391450. The cubic root of 165144668 is about 548.6409065982.

The spelling of 165144668 in words is "one hundred sixty-five million, one hundred forty-four thousand, six hundred sixty-eight".