3668694866 has 4 divisors (see below), whose sum is σ = 5503042302. Its totient is φ = 1834347432.

The previous prime is 3668694853. The next prime is 3668694881. The reversal of 3668694866 is 6684968663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6684968663 = 919 ⋅7274177.

It can be written as a sum of positive squares in only one way, i.e., 3408808225 + 259886641 = 58385^2 + 16121^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3668694799 and 3668694808.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 917173715 + ... + 917173718.

Almost surely, 2^3668694866 is an apocalyptic number.

3668694866 is a deficient number, since it is larger than the sum of its proper divisors (1834347436).

3668694866 is a wasteful number, since it uses less digits than its factorization.

3668694866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834347435.

The product of its digits is 53747712, while the sum is 62.

The square root of 3668694866 is about 60569.7520714754. The cubic root of 3668694866 is about 1542.3059379858.

The spelling of 3668694866 in words is "three billion, six hundred sixty-eight million, six hundred ninety-four thousand, eight hundred sixty-six".