66649859119 has 2 divisors, whose sum is σ = 66649859120. Its totient is φ = 66649859118.

The previous prime is 66649859093. The next prime is 66649859141. The reversal of 66649859119 is 91195894666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66649859119 - 2⁹ = 66649858607 is a prime.

It is a super-2 number, since 2×66649859119² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66649859179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33324929559 + 33324929560.

It is an arithmetic number, because the mean of its divisors is an integer number (33324929560).

Almost surely, 2^66649859119 is an apocalyptic number.

66649859119 is a deficient number, since it is larger than the sum of its proper divisors (1).

66649859119 is an equidigital number, since it uses as much as digits as its factorization.

66649859119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25194240, while the sum is 64.

The spelling of 66649859119 in words is "sixty-six billion, six hundred forty-nine million, eight hundred fifty-nine thousand, one hundred nineteen".