66498125999 has 2 divisors, whose sum is σ = 66498126000. Its totient is φ = 66498125998.

The previous prime is 66498125971. The next prime is 66498126017. The reversal of 66498125999 is 99952189466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66498125999 - 2¹⁶ = 66498060463 is a prime.

It is a super-2 number, since 2×66498125999² (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 (66498125399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33249062999 + 33249063000.

It is an arithmetic number, because the mean of its divisors is an integer number (33249063000).

Almost surely, 2^66498125999 is an apocalyptic number.

66498125999 is a deficient number, since it is larger than the sum of its proper divisors (1).

66498125999 is an equidigital number, since it uses as much as digits as its factorization.

66498125999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75582720, while the sum is 68.

The spelling of 66498125999 in words is "sixty-six billion, four hundred ninety-eight million, one hundred twenty-five thousand, nine hundred ninety-nine".