66498125997 has 16 divisors (see below), whose sum is σ = 89437711680. Its totient is φ = 43946228352.

The previous prime is 66498125971. The next prime is 66498125999. The reversal of 66498125997 is 79952189466.

It is not a de Polignac number, because 66498125997 - 2⁸ = 66498125741 is a prime.

It is a super-2 number, since 2×66498125997² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66498125999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177298 + ... + 405500.

It is an arithmetic number, because the mean of its divisors is an integer number (5589856980).

Almost surely, 2^66498125997 is an apocalyptic number.

It is an amenable number.

66498125997 is a deficient number, since it is larger than the sum of its proper divisors (22939585683).

66498125997 is a wasteful number, since it uses less digits than its factorization.

66498125997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229052.

The product of its digits is 58786560, while the sum is 66.

The spelling of 66498125997 in words is "sixty-six billion, four hundred ninety-eight million, one hundred twenty-five thousand, nine hundred ninety-seven".