3685566731 has 16 divisors (see below), whose sum is σ = 4865287680. Its totient is φ = 2702935680.

The previous prime is 3685566721. The next prime is 3685566809. The reversal of 3685566731 is 1376655863.

It is a cyclic number.

It is not a de Polignac number, because 3685566731 - 2¹⁰ = 3685565707 is a prime.

It is a super-2 number, since 2×3685566731² = 27166804257308052722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3685566731.

It is not an unprimeable number, because it can be changed into a prime (3685566721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1406471 + ... + 1409088.

It is an arithmetic number, because the mean of its divisors is an integer number (304080480).

Almost surely, 2^3685566731 is an apocalyptic number.

3685566731 is a deficient number, since it is larger than the sum of its proper divisors (1179720949).

3685566731 is a wasteful number, since it uses less digits than its factorization.

3685566731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2815594.

The product of its digits is 2721600, while the sum is 50.

The square root of 3685566731 is about 60708.8686354803. The cubic root of 3685566731 is about 1544.6666130255. Note that the first 4 decimals are identical.

The spelling of 3685566731 in words is "three billion, six hundred eighty-five million, five hundred sixty-six thousand, seven hundred thirty-one".