662921109247 has 2 divisors, whose sum is σ = 662921109248. Its totient is φ = 662921109246.

The previous prime is 662921109217. The next prime is 662921109259. The reversal of 662921109247 is 742901129266.

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-662921109247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 662921109247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662921109217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331460554623 + 331460554624.

It is an arithmetic number, because the mean of its divisors is an integer number (331460554624).

Almost surely, 2^662921109247 is an apocalyptic number.

662921109247 is a deficient number, since it is larger than the sum of its proper divisors (1).

662921109247 is an equidigital number, since it uses as much as digits as its factorization.

662921109247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 662921109247 in words is "six hundred sixty-two billion, nine hundred twenty-one million, one hundred nine thousand, two hundred forty-seven".