3874149612666 has 36 divisors (see below), whose sum is σ = 8693419785102. Its totient is φ = 1246852744032.

The previous prime is 3874149612653. The next prime is 3874149612701. The reversal of 3874149612666 is 6662169414783.

It can be written as a sum of positive squares in 3 ways, for example, as 3631391395641 + 242758217025 = 1905621^2 + 492705^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 127945941 + ... + 127976216.

Almost surely, 2^{3874149612666} is an apocalyptic number.

3874149612666 is an abundant number, since it is smaller than the sum of its proper divisors (4819270172436).

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

3874149612666 is a wasteful number, since it uses less digits than its factorization.

3874149612666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255922223 (or 255922191 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 63.

The spelling of 3874149612666 in words is "three trillion, eight hundred seventy-four billion, one hundred forty-nine million, six hundred twelve thousand, six hundred sixty-six".