3400641661 has 2 divisors, whose sum is σ = 3400641662. Its totient is φ = 3400641660.

The previous prime is 3400641613. The next prime is 3400641677. The reversal of 3400641661 is 1661460043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3386541636 + 14100025 = 58194^2 + 3755^2 .

It is an emirp because it is prime and its reverse (1661460043) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3400641661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3400647661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1700320830 + 1700320831.

It is an arithmetic number, because the mean of its divisors is an integer number (1700320831).

Almost surely, 2^3400641661 is an apocalyptic number.

It is an amenable number.

3400641661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3400641661 is an equidigital number, since it uses as much as digits as its factorization.

3400641661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 3400641661 is about 58315.0208865606. The cubic root of 3400641661 is about 1503.7891845861.

The spelling of 3400641661 in words is "three billion, four hundred million, six hundred forty-one thousand, six hundred sixty-one".