6015639661 has 2 divisors, whose sum is σ = 6015639662. Its totient is φ = 6015639660.

The previous prime is 6015639631. The next prime is 6015639667. The reversal of 6015639661 is 1669365106.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3186038025 + 2829601636 = 56445^2 + 53194^2 .

It is a cyclic number.

It is not a de Polignac number, because 6015639661 - 2¹⁷ = 6015508589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6015639667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3007819830 + 3007819831.

It is an arithmetic number, because the mean of its divisors is an integer number (3007819831).

Almost surely, 2^6015639661 is an apocalyptic number.

It is an amenable number.

6015639661 is a deficient number, since it is larger than the sum of its proper divisors (1).

6015639661 is an equidigital number, since it uses as much as digits as its factorization.

6015639661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 6015639661 is about 77560.5548007491. The cubic root of 6015639661 is about 1818.6980646774.

The spelling of 6015639661 in words is "six billion, fifteen million, six hundred thirty-nine thousand, six hundred sixty-one".