3680665785 has 16 divisors (see below), whose sum is σ = 6543406080. Its totient is φ = 1963021680.

The previous prime is 3680665783. The next prime is 3680665787. The reversal of 3680665785 is 5875660863.

3680665785 is a `hidden beast` number, since 3 + 6 + 8 + 0 + 66 + 578 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (3680665783) and next prime (3680665787).

It is not a de Polignac number, because 3680665785 - 2¹ = 3680665783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3680665783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13631961 + ... + 13632230.

It is an arithmetic number, because the mean of its divisors is an integer number (408962880).

Almost surely, 2^3680665785 is an apocalyptic number.

It is an amenable number.

3680665785 is a deficient number, since it is larger than the sum of its proper divisors (2862740295).

3680665785 is a wasteful number, since it uses less digits than its factorization.

3680665785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27264205 (or 27264199 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The square root of 3680665785 is about 60668.4908745883. The cubic root of 3680665785 is about 1543.9816269447.

The spelling of 3680665785 in words is "three billion, six hundred eighty million, six hundred sixty-five thousand, seven hundred eighty-five".