355660666 has 16 divisors (see below), whose sum is σ = 537634944. Its totient is φ = 176453424.

The previous prime is 355660663. The next prime is 355660667. The reversal of 355660666 is 666066553.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (355660663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334051 + ... + 335113.

It is an arithmetic number, because the mean of its divisors is an integer number (33602184).

Almost surely, 2^355660666 is an apocalyptic number.

355660666 is a deficient number, since it is larger than the sum of its proper divisors (181974278).

355660666 is a wasteful number, since it uses less digits than its factorization.

355660666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2205.

The product of its (nonzero) digits is 583200, while the sum is 43.

The square root of 355660666 is about 18858.9677872359. The cubic root of 355660666 is about 708.5088495653.

The spelling of 355660666 in words is "three hundred fifty-five million, six hundred sixty thousand, six hundred sixty-six".