66308197444 has 6 divisors (see below), whose sum is σ = 116039345534. Its totient is φ = 33154098720.

The previous prime is 66308197411. The next prime is 66308197447. The reversal of 66308197444 is 44479180366.

It can be written as a sum of positive squares in only one way, i.e., 58836323844 + 7471873600 = 242562^2 + 86440^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66308197391 and 66308197400.

It is not an unprimeable number, because it can be changed into a prime (66308197447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8288524677 + ... + 8288524684.

Almost surely, 2^66308197444 is an apocalyptic number.

It is an amenable number.

66308197444 is a deficient number, since it is larger than the sum of its proper divisors (49731148090).

66308197444 is a wasteful number, since it uses less digits than its factorization.

66308197444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16577049365 (or 16577049363 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 52.

The spelling of 66308197444 in words is "sixty-six billion, three hundred eight million, one hundred ninety-seven thousand, four hundred forty-four".