2604406040666 has 16 divisors (see below), whose sum is σ = 4034658405120. Its totient is φ = 1259562191040.

The previous prime is 2604406040651. The next prime is 2604406040683. The reversal of 2604406040666 is 6660406044062.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10447151 + ... + 10693538.

It is an arithmetic number, because the mean of its divisors is an integer number (252166150320).

Almost surely, 2^{2604406040666} is an apocalyptic number.

2604406040666 is a deficient number, since it is larger than the sum of its proper divisors (1430252364454).

2604406040666 is a wasteful number, since it uses less digits than its factorization.

2604406040666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21142709.

The product of its (nonzero) digits is 995328, while the sum is 44.

The spelling of 2604406040666 in words is "two trillion, six hundred four billion, four hundred six million, forty thousand, six hundred sixty-six".