1333221666 has 32 divisors (see below), whose sum is σ = 3129728640. Its totient is φ = 370624896.

The previous prime is 1333221661. The next prime is 1333221671. The reversal of 1333221666 is 6661223331.

It is an interprime number because it is at equal distance from previous prime (1333221661) and next prime (1333221671).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1333221661) 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 15 ways as a sum of consecutive naturals, for example, 427411 + ... + 430518.

It is an arithmetic number, because the mean of its divisors is an integer number (97804020).

Almost surely, 2^1333221666 is an apocalyptic number.

1333221666 is an abundant number, since it is smaller than the sum of its proper divisors (1796506974).

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

1333221666 is a wasteful number, since it uses less digits than its factorization.

1333221666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857978.

The product of its digits is 23328, while the sum is 33.

The square root of 1333221666 is about 36513.3080670596. The cubic root of 1333221666 is about 1100.6116889895.

Adding to 1333221666 its reverse (6661223331), we get a palindrome (7994444997).

The spelling of 1333221666 in words is "one billion, three hundred thirty-three million, two hundred twenty-one thousand, six hundred sixty-six".