47257666 has 8 divisors (see below), whose sum is σ = 72615564. Its totient is φ = 23052480.

The previous prime is 47257649. The next prime is 47257669. The reversal of 47257666 is 66675274.

It can be written as a sum of positive squares in 2 ways, for example, as 36857041 + 10400625 = 6071^2 + 3225^2 .

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 (47257669) 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, 288075 + ... + 288238.

Almost surely, 2^47257666 is an apocalyptic number.

47257666 is a deficient number, since it is larger than the sum of its proper divisors (25357898).

47257666 is a wasteful number, since it uses less digits than its factorization.

47257666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576356.

The product of its digits is 423360, while the sum is 43.

The square root of 47257666 is about 6874.4211392669. The cubic root of 47257666 is about 361.5408900511.

The spelling of 47257666 in words is "forty-seven million, two hundred fifty-seven thousand, six hundred sixty-six".