347447666 has 16 divisors (see below), whose sum is σ = 570858840. Its totient is φ = 157866240.

The previous prime is 347447647. The next prime is 347447687. The reversal of 347447666 is 666744743.

It is a happy number.

347447666 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 239599441 + 107848225 = 15479^2 + 10385^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 347447666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175205 + ... + 177176.

Almost surely, 2^347447666 is an apocalyptic number.

347447666 is a deficient number, since it is larger than the sum of its proper divisors (223411174).

347447666 is a wasteful number, since it uses less digits than its factorization.

347447666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352429.

The product of its digits is 2032128, while the sum is 47.

The square root of 347447666 is about 18639.9481222454. The cubic root of 347447666 is about 703.0126388249.

The spelling of 347447666 in words is "three hundred forty-seven million, four hundred forty-seven thousand, six hundred sixty-six".