165600166447 has 4 divisors (see below), whose sum is σ = 168314923336. Its totient is φ = 162885409560.

The previous prime is 165600166441. The next prime is 165600166453. The reversal of 165600166447 is 744661006561.

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

It is an interprime number because it is at equal distance from previous prime (165600166441) and next prime (165600166453).

It is a cyclic number.

It is not a de Polignac number, because 165600166447 - 2²³ = 165591777839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165600166397 and 165600166406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165600166441) 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, 1357378353 + ... + 1357378474.

It is an arithmetic number, because the mean of its divisors is an integer number (42078730834).

Almost surely, 2^165600166447 is an apocalyptic number.

165600166447 is a deficient number, since it is larger than the sum of its proper divisors (2714756889).

165600166447 is an equidigital number, since it uses as much as digits as its factorization.

165600166447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2714756888.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 165600166447 in words is "one hundred sixty-five billion, six hundred million, one hundred sixty-six thousand, four hundred forty-seven".