3686668537 has 2 divisors, whose sum is σ = 3686668538. Its totient is φ = 3686668536.

The previous prime is 3686668483. The next prime is 3686668549. The reversal of 3686668537 is 7358666863.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2430391401 + 1256277136 = 49299^2 + 35444^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3686668537 is a prime.

It is not a weakly prime, because it can be changed into another prime (3686668837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1843334268 + 1843334269.

It is an arithmetic number, because the mean of its divisors is an integer number (1843334269).

Almost surely, 2^3686668537 is an apocalyptic number.

It is an amenable number.

3686668537 is a deficient number, since it is larger than the sum of its proper divisors (1).

3686668537 is an equidigital number, since it uses as much as digits as its factorization.

3686668537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26127360, while the sum is 58.

The square root of 3686668537 is about 60717.9424634926. The cubic root of 3686668537 is about 1544.8205245310.

The spelling of 3686668537 in words is "three billion, six hundred eighty-six million, six hundred sixty-eight thousand, five hundred thirty-seven".