2084406400666 has 16 divisors (see below), whose sum is σ = 3129992896680. Its totient is φ = 1041075624960.

The previous prime is 2084406400579. The next prime is 2084406400679. The reversal of 2084406400666 is 6660046044802.

It can be written as a sum of positive squares in 4 ways, for example, as 1984376525041 + 100029875625 = 1408679^2 + 316275^2 .

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, 25630380 + ... + 25711576.

Almost surely, 2^{2084406400666} is an apocalyptic number.

2084406400666 is a deficient number, since it is larger than the sum of its proper divisors (1045586496014).

2084406400666 is a wasteful number, since it uses less digits than its factorization.

2084406400666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94929.

The product of its (nonzero) digits is 1327104, while the sum is 46.

The spelling of 2084406400666 in words is "two trillion, eighty-four billion, four hundred six million, four hundred thousand, six hundred sixty-six".