330220666 has 4 divisors (see below), whose sum is σ = 495331002. Its totient is φ = 165110332.

The previous prime is 330220661. The next prime is 330220673. The reversal of 330220666 is 666022033.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666022033 = 29 ⋅22966277.

It can be written as a sum of positive squares in only one way, i.e., 217415025 + 112805641 = 14745^2 + 10621^2 .

It is not an unprimeable number, because it can be changed into a prime (330220661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82555165 + ... + 82555168.

Almost surely, 2^330220666 is an apocalyptic number.

330220666 is a deficient number, since it is larger than the sum of its proper divisors (165110336).

330220666 is a wasteful number, since it uses less digits than its factorization.

330220666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165110335.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 330220666 is about 18171.9747413428. The cubic root of 330220666 is about 691.1963185251.

Adding to 330220666 its reverse (666022033), we get a palindrome (996242699).

The spelling of 330220666 in words is "three hundred thirty million, two hundred twenty thousand, six hundred sixty-six".