666402104 has 16 divisors (see below), whose sum is σ = 1249778400. Its totient is φ = 333127872.

The previous prime is 666402101. The next prime is 666402119. The reversal of 666402104 is 401204666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666402101) 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 3 ways as a sum of consecutive naturals, for example, 63332 + ... + 73100.

It is an arithmetic number, because the mean of its divisors is an integer number (78111150).

Almost surely, 2^666402104 is an apocalyptic number.

It is an amenable number.

666402104 is a deficient number, since it is larger than the sum of its proper divisors (583376296).

666402104 is a wasteful number, since it uses less digits than its factorization.

666402104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18302 (or 18298 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 666402104 is about 25814.7652323239. The cubic root of 666402104 is about 873.4648910581.

The spelling of 666402104 in words is "six hundred sixty-six million, four hundred two thousand, one hundred four".