66245612747 has 2 divisors, whose sum is σ = 66245612748. Its totient is φ = 66245612746.

The previous prime is 66245612737. The next prime is 66245612837. The reversal of 66245612747 is 74721654266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66245612747 - 2⁶ = 66245612683 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66245612695 and 66245612704.

It is not a weakly prime, because it can be changed into another prime (66245612737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33122806373 + 33122806374.

It is an arithmetic number, because the mean of its divisors is an integer number (33122806374).

Almost surely, 2^66245612747 is an apocalyptic number.

66245612747 is a deficient number, since it is larger than the sum of its proper divisors (1).

66245612747 is an equidigital number, since it uses as much as digits as its factorization.

66245612747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3386880, while the sum is 50.

The spelling of 66245612747 in words is "sixty-six billion, two hundred forty-five million, six hundred twelve thousand, seven hundred forty-seven".