3814657661 has 2 divisors, whose sum is σ = 3814657662. Its totient is φ = 3814657660.

The previous prime is 3814657657. The next prime is 3814657703. The reversal of 3814657661 is 1667564183.

3814657661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2841529636 + 973128025 = 53306^2 + 31195^2 .

It is a cyclic number.

It is not a de Polignac number, because 3814657661 - 2² = 3814657657 is a prime.

It is a super-2 number, since 2×3814657661² = 29103226141251981842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3814657061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1907328830 + 1907328831.

It is an arithmetic number, because the mean of its divisors is an integer number (1907328831).

Almost surely, 2^3814657661 is an apocalyptic number.

It is an amenable number.

3814657661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3814657661 is an equidigital number, since it uses as much as digits as its factorization.

3814657661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 47.

The square root of 3814657661 is about 61762.9149328300. The cubic root of 3814657661 is about 1562.4945926298.

The spelling of 3814657661 in words is "three billion, eight hundred fourteen million, six hundred fifty-seven thousand, six hundred sixty-one".