303606666 has 36 divisors (see below), whose sum is σ = 723057426. Its totient is φ = 92001360.

The previous prime is 303606661. The next prime is 303606671. The reversal of 303606666 is 666606303.

It is an interprime number because it is at equal distance from previous prime (303606661) and next prime (303606671).

It can be written as a sum of positive squares in only one way, i.e., 286591041 + 17015625 = 16929^2 + 4125^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 303606666.

It is not an unprimeable number, because it can be changed into a prime (303606661) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 67521 + ... + 71876.

Almost surely, 2^303606666 is an apocalyptic number.

303606666 is an abundant number, since it is smaller than the sum of its proper divisors (419450760).

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

303606666 is a wasteful number, since it uses less digits than its factorization.

303606666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139427 (or 139413 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 36.

The square root of 303606666 is about 17424.3124971977. The cubic root of 303606666 is about 672.1049607523.

The spelling of 303606666 in words is "three hundred three million, six hundred six thousand, six hundred sixty-six".