47778566 has 8 divisors (see below), whose sum is σ = 78183144. Its totient is φ = 21717520.

The previous prime is 47778529. The next prime is 47778583. The reversal of 47778566 is 66587774.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1085855 + ... + 1085898.

It is an arithmetic number, because the mean of its divisors is an integer number (9772893).

Almost surely, 2^47778566 is an apocalyptic number.

47778566 is a deficient number, since it is larger than the sum of its proper divisors (30404578).

47778566 is a wasteful number, since it uses less digits than its factorization.

47778566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2171766.

The product of its digits is 1975680, while the sum is 50.

The square root of 47778566 is about 6912.2041347171. The cubic root of 47778566 is about 362.8644066020.

The spelling of 47778566 in words is "forty-seven million, seven hundred seventy-eight thousand, five hundred sixty-six".