6604629961 has 2 divisors, whose sum is σ = 6604629962. Its totient is φ = 6604629960.

The previous prime is 6604629943. The next prime is 6604629973. The reversal of 6604629961 is 1699264066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5554869961 + 1049760000 = 74531^2 + 32400^2 .

It is a cyclic number.

It is not a de Polignac number, because 6604629961 - 2¹⁵ = 6604597193 is a prime.

It is a super-2 number, since 2×6604629961² = 87242273843477723042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6604659961) 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, 3302314980 + 3302314981.

It is an arithmetic number, because the mean of its divisors is an integer number (3302314981).

Almost surely, 2^6604629961 is an apocalyptic number.

It is an amenable number.

6604629961 is a deficient number, since it is larger than the sum of its proper divisors (1).

6604629961 is an equidigital number, since it uses as much as digits as its factorization.

6604629961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 6604629961 is about 81268.8744907914. The cubic root of 6604629961 is about 1876.2159779142.

The spelling of 6604629961 in words is "six billion, six hundred four million, six hundred twenty-nine thousand, nine hundred sixty-one".