656719538707 has 2 divisors, whose sum is σ = 656719538708. Its totient is φ = 656719538706.

The previous prime is 656719538681. The next prime is 656719538711. The reversal of 656719538707 is 707835917656.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656719538707 is a prime.

It is not a weakly prime, because it can be changed into another prime (656719538107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328359769353 + 328359769354.

It is an arithmetic number, because the mean of its divisors is an integer number (328359769354).

Almost surely, 2^656719538707 is an apocalyptic number.

656719538707 is a deficient number, since it is larger than the sum of its proper divisors (1).

656719538707 is an equidigital number, since it uses as much as digits as its factorization.

656719538707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 66679200, while the sum is 64.

The spelling of 656719538707 in words is "six hundred fifty-six billion, seven hundred nineteen million, five hundred thirty-eight thousand, seven hundred seven".