7830349661 has 2 divisors, whose sum is σ = 7830349662. Its totient is φ = 7830349660.

The previous prime is 7830349643. The next prime is 7830349663. The reversal of 7830349661 is 1669430387.

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., 7802365561 + 27984100 = 88331^2 + 5290^2 .

It is an emirp because it is prime and its reverse (1669430387) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7830349661 is a prime.

It is a super-2 number, since 2×7830349661² (a number of 21 digits) contains 22 as substring.

Together with 7830349663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7830349663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3915174830 + 3915174831.

It is an arithmetic number, because the mean of its divisors is an integer number (3915174831).

Almost surely, 2^7830349661 is an apocalyptic number.

It is an amenable number.

7830349661 is a deficient number, since it is larger than the sum of its proper divisors (1).

7830349661 is an equidigital number, since it uses as much as digits as its factorization.

7830349661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 7830349661 is about 88489.2629701480. The cubic root of 7830349661 is about 1985.7613426295.

The spelling of 7830349661 in words is "seven billion, eight hundred thirty million, three hundred forty-nine thousand, six hundred sixty-one".