66626361297 has 8 divisors (see below), whose sum is σ = 98705720480. Its totient is φ = 44417574180.

The previous prime is 66626361287. The next prime is 66626361317. The reversal of 66626361297 is 79216362666.

It is not a de Polignac number, because 66626361297 - 2⁶ = 66626361233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66626361287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1233821479 + ... + 1233821532.

It is an arithmetic number, because the mean of its divisors is an integer number (12338215060).

Almost surely, 2^66626361297 is an apocalyptic number.

It is an amenable number.

66626361297 is a deficient number, since it is larger than the sum of its proper divisors (32079359183).

66626361297 is a wasteful number, since it uses less digits than its factorization.

66626361297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2467643020 (or 2467643014 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 54.

The spelling of 66626361297 in words is "sixty-six billion, six hundred twenty-six million, three hundred sixty-one thousand, two hundred ninety-seven".