666412044 has 24 divisors (see below), whose sum is σ = 1559970048. Its totient is φ = 221421840.

The previous prime is 666412001. The next prime is 666412049. The reversal of 666412044 is 440214666.

It is a junction number, because it is equal to n+sod(n) for n = 666411996 and 666412014.

It is not an unprimeable number, because it can be changed into a prime (666412049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85552 + ... + 93015.

It is an arithmetic number, because the mean of its divisors is an integer number (64998752).

Almost surely, 2^666412044 is an apocalyptic number.

It is an amenable number.

666412044 is an abundant number, since it is smaller than the sum of its proper divisors (893558004).

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

666412044 is a wasteful number, since it uses less digits than its factorization.

666412044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178885 (or 178883 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 666412044 is about 25814.9577570834. The cubic root of 666412044 is about 873.4692338804.

The spelling of 666412044 in words is "six hundred sixty-six million, four hundred twelve thousand, forty-four".