3686566957 has 2 divisors, whose sum is σ = 3686566958. Its totient is φ = 3686566956.

The previous prime is 3686566931. The next prime is 3686566967. The reversal of 3686566957 is 7596656863.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2448864196 + 1237702761 = 49486^2 + 35181^2 .

It is an emirp because it is prime and its reverse (7596656863) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3686566957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3686566895 and 3686566904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3686566907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1843283478 + 1843283479.

It is an arithmetic number, because the mean of its divisors is an integer number (1843283479).

Almost surely, 2^3686566957 is an apocalyptic number.

It is an amenable number.

3686566957 is a deficient number, since it is larger than the sum of its proper divisors (1).

3686566957 is an equidigital number, since it uses as much as digits as its factorization.

3686566957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48988800, while the sum is 61.

The square root of 3686566957 is about 60717.1059669349. The cubic root of 3686566957 is about 1544.8063360834.

The spelling of 3686566957 in words is "three billion, six hundred eighty-six million, five hundred sixty-six thousand, nine hundred fifty-seven".