66358560707 has 4 divisors (see below), whose sum is σ = 66598122576. Its totient is φ = 66118998840.

The previous prime is 66358560703. The next prime is 66358560743. The reversal of 66358560707 is 70706585366.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70706585366 = 2 ⋅35353292683.

It is a cyclic number.

It is not a de Polignac number, because 66358560707 - 2² = 66358560703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66358560703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119780519 + ... + 119781072.

It is an arithmetic number, because the mean of its divisors is an integer number (16649530644).

Almost surely, 2^66358560707 is an apocalyptic number.

66358560707 is a deficient number, since it is larger than the sum of its proper divisors (239561869).

66358560707 is a wasteful number, since it uses less digits than its factorization.

66358560707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239561868.

The product of its (nonzero) digits is 6350400, while the sum is 53.

The spelling of 66358560707 in words is "sixty-six billion, three hundred fifty-eight million, five hundred sixty thousand, seven hundred seven".