6636238487 has 2 divisors, whose sum is σ = 6636238488. Its totient is φ = 6636238486.

The previous prime is 6636238457. The next prime is 6636238517. The reversal of 6636238487 is 7848326366.

It is a balanced prime because it is at equal distance from previous prime (6636238457) and next prime (6636238517).

It is a cyclic number.

It is not a de Polignac number, because 6636238487 - 2¹⁰ = 6636237463 is a prime.

It is a super-2 number, since 2×6636238487² = 88079322512680098338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6636238457) 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, 3318119243 + 3318119244.

It is an arithmetic number, because the mean of its divisors is an integer number (3318119244).

Almost surely, 2^6636238487 is an apocalyptic number.

6636238487 is a deficient number, since it is larger than the sum of its proper divisors (1).

6636238487 is an equidigital number, since it uses as much as digits as its factorization.

6636238487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6967296, while the sum is 53.

The square root of 6636238487 is about 81463.1112037835. Note that the first 3 decimals coincide. The cubic root of 6636238487 is about 1879.2042889414.

The spelling of 6636238487 in words is "six billion, six hundred thirty-six million, two hundred thirty-eight thousand, four hundred eighty-seven".