3814587661 has 2 divisors, whose sum is σ = 3814587662. Its totient is φ = 3814587660.

The previous prime is 3814587659. The next prime is 3814587671. The reversal of 3814587661 is 1667854183.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2031214761 + 1783372900 = 45069^2 + 42230^2 .

It is a cyclic number.

It is not a de Polignac number, because 3814587661 - 2¹ = 3814587659 is a prime.

Together with 3814587659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3814587641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1907293830 + 1907293831.

It is an arithmetic number, because the mean of its divisors is an integer number (1907293831).

Almost surely, 2^3814587661 is an apocalyptic number.

It is an amenable number.

3814587661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3814587661 is an equidigital number, since it uses as much as digits as its factorization.

3814587661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 49.

The square root of 3814587661 is about 61762.3482471319. The cubic root of 3814587661 is about 1562.4850351719.

The spelling of 3814587661 in words is "three billion, eight hundred fourteen million, five hundred eighty-seven thousand, six hundred sixty-one".