66415641199 has 2 divisors, whose sum is σ = 66415641200. Its totient is φ = 66415641198.

The previous prime is 66415641113. The next prime is 66415641287. The reversal of 66415641199 is 99114651466.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66415641199 is a prime.

It is a super-2 number, since 2×66415641199² (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 (66415341199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33207820599 + 33207820600.

It is an arithmetic number, because the mean of its divisors is an integer number (33207820600).

Almost surely, 2^66415641199 is an apocalyptic number.

66415641199 is a deficient number, since it is larger than the sum of its proper divisors (1).

66415641199 is an equidigital number, since it uses as much as digits as its factorization.

66415641199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 52.

The spelling of 66415641199 in words is "sixty-six billion, four hundred fifteen million, six hundred forty-one thousand, one hundred ninety-nine".