42544204666 has 8 divisors (see below), whose sum is σ = 63817220340. Its totient is φ = 21271797888.

The previous prime is 42544204663. The next prime is 42544204697. The reversal of 42544204666 is 66640244524.

It can be written as a sum of positive squares in 2 ways, for example, as 40697010225 + 1847194441 = 201735^2 + 42979^2 .

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

It is not an unprimeable number, because it can be changed into a prime (42544204663) 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, 119370 + ... + 315178.

Almost surely, 2^42544204666 is an apocalyptic number.

42544204666 is a deficient number, since it is larger than the sum of its proper divisors (21273015674).

42544204666 is a wasteful number, since it uses less digits than its factorization.

42544204666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304448.

The product of its (nonzero) digits is 1105920, while the sum is 43.

The spelling of 42544204666 in words is "forty-two billion, five hundred forty-four million, two hundred four thousand, six hundred sixty-six".