165505016500657 has 8 divisors (see below), whose sum is σ = 175745621867616. Its totient is φ = 155320524040512.

The previous prime is 165505016500631. The next prime is 165505016500667. The reversal of 165505016500657 is 756005610505561.

165505016500657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165505016500657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165505016500667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14028220623 + ... + 14028232420.

It is an arithmetic number, because the mean of its divisors is an integer number (21968202733452).

Almost surely, 2^{165505016500657} is an apocalyptic number.

165505016500657 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

165505016500657 is a deficient number, since it is larger than the sum of its proper divisors (10240605366959).

165505016500657 is a wasteful number, since it uses less digits than its factorization.

165505016500657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28056453407.

The product of its (nonzero) digits is 4725000, while the sum is 52.

The spelling of 165505016500657 in words is "one hundred sixty-five trillion, five hundred five billion, sixteen million, five hundred thousand, six hundred fifty-seven".