3725886656666 has 16 divisors (see below), whose sum is σ = 5667026046144. Its totient is φ = 1836892720224.

The previous prime is 3725886656603. The next prime is 3725886656677. The reversal of 3725886656666 is 6666566885273.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3725886656593 and 3725886656602.

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, 3179036 + ... + 4190231.

It is an arithmetic number, because the mean of its divisors is an integer number (354189127884).

Almost surely, 2^{3725886656666} is an apocalyptic number.

3725886656666 is a deficient number, since it is larger than the sum of its proper divisors (1941139389478).

3725886656666 is a wasteful number, since it uses less digits than its factorization.

3725886656666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7372805.

The product of its digits is 3135283200, while the sum is 74.

The spelling of 3725886656666 in words is "three trillion, seven hundred twenty-five billion, eight hundred eighty-six million, six hundred fifty-six thousand, six hundred sixty-six".