347706666 has 12 divisors (see below), whose sum is σ = 753364482. Its totient is φ = 115902216.

The previous prime is 347706587. The next prime is 347706673. The reversal of 347706666 is 666607743.

It can be written as a sum of positive squares in only one way, i.e., 181683441 + 166023225 = 13479^2 + 12885^2 .

It is a Curzon number.

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, 9658501 + ... + 9658536.

Almost surely, 2^347706666 is an apocalyptic number.

347706666 is an abundant number, since it is smaller than the sum of its proper divisors (405657816).

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

347706666 is a wasteful number, since it uses less digits than its factorization.

347706666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19317045 (or 19317042 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 45.

The square root of 347706666 is about 18646.8942722374. The cubic root of 347706666 is about 703.1872790820.

The spelling of 347706666 in words is "three hundred forty-seven million, seven hundred six thousand, six hundred sixty-six".