16165666655659 has 4 divisors (see below), whose sum is σ = 16166691956304. Its totient is φ = 16164641355016.

The previous prime is 16165666655653. The next prime is 16165666655729. The reversal of 16165666655659 is 95655666656161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16165666655659 - 2³ = 16165666655651 is a prime.

It is a super-2 number, since 2×16165666655659² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16165666655591 and 16165666655600.

It is not an unprimeable number, because it can be changed into a prime (16165666655651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512626672 + ... + 512658205.

It is an arithmetic number, because the mean of its divisors is an integer number (4041672989076).

Almost surely, 2^{16165666655659} is an apocalyptic number.

16165666655659 is a deficient number, since it is larger than the sum of its proper divisors (1025300645).

16165666655659 is a wasteful number, since it uses less digits than its factorization.

16165666655659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025300644.

The product of its digits is 1574640000, while the sum is 73.

The spelling of 16165666655659 in words is "sixteen trillion, one hundred sixty-five billion, six hundred sixty-six million, six hundred fifty-five thousand, six hundred fifty-nine".