666533330 has 16 divisors (see below), whose sum is σ = 1251923904. Its totient is φ = 255021360.

The previous prime is 666533327. The next prime is 666533333. The reversal of 666533330 is 33335666.

It is an interprime number because it is at equal distance from previous prime (666533327) and next prime (666533333).

It is a super-5 number, since 5×666533330⁵ (a number of 45 digits) contains 55555 as substring.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (666533333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1448756 + ... + 1449215.

It is an arithmetic number, because the mean of its divisors is an integer number (78245244).

Almost surely, 2^666533330 is an apocalyptic number.

666533330 is a deficient number, since it is larger than the sum of its proper divisors (585390574).

666533330 is a wasteful number, since it uses less digits than its factorization.

666533330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2898001.

The product of its (nonzero) digits is 87480, while the sum is 35.

The square root of 666533330 is about 25817.3067921501. The cubic root of 666533330 is about 873.5222206995.

Adding to 666533330 its reverse (33335666), we get a palindrome (699868996).

The spelling of 666533330 in words is "six hundred sixty-six million, five hundred thirty-three thousand, three hundred thirty".