66954087247 has 2 divisors, whose sum is σ = 66954087248. Its totient is φ = 66954087246.

The previous prime is 66954087163. The next prime is 66954087253. The reversal of 66954087247 is 74278045966.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66954087247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66954087191 and 66954087200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66954087287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33477043623 + 33477043624.

It is an arithmetic number, because the mean of its divisors is an integer number (33477043624).

Almost surely, 2^66954087247 is an apocalyptic number.

66954087247 is a deficient number, since it is larger than the sum of its proper divisors (1).

66954087247 is an equidigital number, since it uses as much as digits as its factorization.

66954087247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20321280, while the sum is 58.

The spelling of 66954087247 in words is "sixty-six billion, nine hundred fifty-four million, eighty-seven thousand, two hundred forty-seven".