6461665087 has 2 divisors, whose sum is σ = 6461665088. Its totient is φ = 6461665086.

The previous prime is 6461665069. The next prime is 6461665109. The reversal of 6461665087 is 7805661646.

6461665087 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6461665087 - 2⁷ = 6461664959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6461665087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6461665187) 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, 3230832543 + 3230832544.

It is an arithmetic number, because the mean of its divisors is an integer number (3230832544).

Almost surely, 2^6461665087 is an apocalyptic number.

6461665087 is a deficient number, since it is larger than the sum of its proper divisors (1).

6461665087 is an equidigital number, since it uses as much as digits as its factorization.

6461665087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The square root of 6461665087 is about 80384.4828744951. The cubic root of 6461665087 is about 1862.5794833698.

The spelling of 6461665087 in words is "six billion, four hundred sixty-one million, six hundred sixty-five thousand, eighty-seven".