6603861401 has 2 divisors, whose sum is σ = 6603861402. Its totient is φ = 6603861400.

The previous prime is 6603861389. The next prime is 6603861437. The reversal of 6603861401 is 1041683066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3782127001 + 2821734400 = 61499^2 + 53120^2 .

It is a cyclic number.

It is not a de Polignac number, because 6603861401 - 2¹⁰ = 6603860377 is a prime.

It is a super-2 number, since 2×6603861401² = 87221970807235365602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6603861461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3301930700 + 3301930701.

It is an arithmetic number, because the mean of its divisors is an integer number (3301930701).

Almost surely, 2^6603861401 is an apocalyptic number.

It is an amenable number.

6603861401 is a deficient number, since it is larger than the sum of its proper divisors (1).

6603861401 is an equidigital number, since it uses as much as digits as its factorization.

6603861401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 6603861401 is about 81264.1458516608. The cubic root of 6603861401 is about 1876.1431986419.

The spelling of 6603861401 in words is "six billion, six hundred three million, eight hundred sixty-one thousand, four hundred one".