165722668 has 6 divisors (see below), whose sum is σ = 290014676. Its totient is φ = 82861332.

The previous prime is 165722653. The next prime is 165722699. The reversal of 165722668 is 866227561.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20715330 + ... + 20715337.

Almost surely, 2^165722668 is an apocalyptic number.

It is an amenable number.

165722668 is a deficient number, since it is larger than the sum of its proper divisors (124292008).

165722668 is a wasteful number, since it uses less digits than its factorization.

165722668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41430671 (or 41430669 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 165722668 is about 12873.3316588986. The cubic root of 165722668 is about 549.2802353410.

The spelling of 165722668 in words is "one hundred sixty-five million, seven hundred twenty-two thousand, six hundred sixty-eight".