661282739903 has 2 divisors, whose sum is σ = 661282739904. Its totient is φ = 661282739902.

The previous prime is 661282739731. The next prime is 661282739933. The reversal of 661282739903 is 309937282166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 661282739903 - 2¹⁸ = 661282477759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (661282739933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330641369951 + 330641369952.

It is an arithmetic number, because the mean of its divisors is an integer number (330641369952).

Almost surely, 2^661282739903 is an apocalyptic number.

661282739903 is a deficient number, since it is larger than the sum of its proper divisors (1).

661282739903 is an equidigital number, since it uses as much as digits as its factorization.

661282739903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5878656, while the sum is 56.

The spelling of 661282739903 in words is "six hundred sixty-one billion, two hundred eighty-two million, seven hundred thirty-nine thousand, nine hundred three".