42471666 has 12 divisors (see below), whose sum is σ = 92021982. Its totient is φ = 14157216.

The previous prime is 42471647. The next prime is 42471679. The reversal of 42471666 is 66617424.

It can be written as a sum of positive squares in only one way, i.e., 38750625 + 3721041 = 6225^2 + 1929^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42471666.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1179751 + ... + 1179786.

Almost surely, 2^42471666 is an apocalyptic number.

42471666 is an abundant number, since it is smaller than the sum of its proper divisors (49550316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42471666 is a wasteful number, since it uses less digits than its factorization.

42471666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359545 (or 2359542 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 42471666 is about 6517.0289242875. The cubic root of 42471666 is about 348.8990329240.

The spelling of 42471666 in words is "forty-two million, four hundred seventy-one thousand, six hundred sixty-six".