3683646657 has 6 divisors (see below), whose sum is σ = 5320822962. Its totient is φ = 2455764432.

The previous prime is 3683646647. The next prime is 3683646677. The reversal of 3683646657 is 7566463863.

It can be written as a sum of positive squares in only one way, i.e., 3676724496 + 6922161 = 60636^2 + 2631^2 .

It is not a de Polignac number, because 3683646657 - 2⁷ = 3683646529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3683646647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 204647028 + ... + 204647045.

It is an arithmetic number, because the mean of its divisors is an integer number (886803827).

Almost surely, 2^3683646657 is an apocalyptic number.

It is an amenable number.

3683646657 is a deficient number, since it is larger than the sum of its proper divisors (1637176305).

3683646657 is a wasteful number, since it uses less digits than its factorization.

3683646657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409294079 (or 409294076 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 54.

The square root of 3683646657 is about 60693.0527902494. The cubic root of 3683646657 is about 1544.3983241739.

The spelling of 3683646657 in words is "three billion, six hundred eighty-three million, six hundred forty-six thousand, six hundred fifty-seven".