666834880 has 28 divisors (see below), whose sum is σ = 1587901320. Its totient is φ = 266733824.

The previous prime is 666834869. The next prime is 666834907. The reversal of 666834880 is 88438666.

It is a super-2 number, since 2×666834880² = 889337514369228800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1041610 + ... + 1042249.

Almost surely, 2^666834880 is an apocalyptic number.

It is an amenable number.

666834880 is an abundant number, since it is smaller than the sum of its proper divisors (921066440).

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

666834880 is a wasteful number, since it uses less digits than its factorization.

666834880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2083876 (or 2083866 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 49.

The square root of 666834880 is about 25823.1462064559. The cubic root of 666834880 is about 873.6539324985.

The spelling of 666834880 in words is "six hundred sixty-six million, eight hundred thirty-four thousand, eight hundred eighty".