666040104 has 32 divisors (see below), whose sum is σ = 1850112000. Its totient is φ = 222013296.

The previous prime is 666040087. The next prime is 666040153. The reversal of 666040104 is 401040666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 7 ways as a sum of consecutive naturals, for example, 1541544 + ... + 1541975.

It is an arithmetic number, because the mean of its divisors is an integer number (57816000).

Almost surely, 2^666040104 is an apocalyptic number.

It is an amenable number.

666040104 is an abundant number, since it is smaller than the sum of its proper divisors (1184071896).

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

666040104 is a wasteful number, since it uses less digits than its factorization.

666040104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3083534 (or 3083524 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 666040104 is about 25807.7527886486. The cubic root of 666040104 is about 873.3067025010.

It can be divided in two parts, 6660 and 40104, that added together give a palindrome (46764).

The spelling of 666040104 in words is "six hundred sixty-six million, forty thousand, one hundred four".