6659442469 has 2 divisors, whose sum is σ = 6659442470. Its totient is φ = 6659442468.

The previous prime is 6659442457. The next prime is 6659442479. The reversal of 6659442469 is 9642449566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6569913025 + 89529444 = 81055^2 + 9462^2 .

It is a cyclic number.

It is not a de Polignac number, because 6659442469 - 2⁵ = 6659442437 is a prime.

It is a super-2 number, since 2×6659442469² = 88696347995841631922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6659442479) 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, 3329721234 + 3329721235.

It is an arithmetic number, because the mean of its divisors is an integer number (3329721235).

Almost surely, 2^6659442469 is an apocalyptic number.

It is an amenable number.

6659442469 is a deficient number, since it is larger than the sum of its proper divisors (1).

6659442469 is an equidigital number, since it uses as much as digits as its factorization.

6659442469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11197440, while the sum is 55.

The square root of 6659442469 is about 81605.4071063922. The cubic root of 6659442469 is about 1881.3919890269.

The spelling of 6659442469 in words is "six billion, six hundred fifty-nine million, four hundred forty-two thousand, four hundred sixty-nine".