168660447 has 8 divisors (see below), whose sum is σ = 225039360. Its totient is φ = 112360920.

The previous prime is 168660439. The next prime is 168660461. The reversal of 168660447 is 744066861.

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

It is not a de Polignac number, because 168660447 - 2³ = 168660439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 168660399 and 168660408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168660647) 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, 14697 + ... + 23522.

It is an arithmetic number, because the mean of its divisors is an integer number (28129920).

Almost surely, 2^168660447 is an apocalyptic number.

168660447 is a deficient number, since it is larger than the sum of its proper divisors (56378913).

168660447 is a wasteful number, since it uses less digits than its factorization.

168660447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39693.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 168660447 is about 12986.9337027645. The cubic root of 168660447 is about 552.5069545885.

The spelling of 168660447 in words is "one hundred sixty-eight million, six hundred sixty thousand, four hundred forty-seven".