661369703 has 2 divisors, whose sum is σ = 661369704. Its totient is φ = 661369702.

The previous prime is 661369693. The next prime is 661369739. The reversal of 661369703 is 307963166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 661369703 - 2¹⁰ = 661368679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (661362703) 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, 330684851 + 330684852.

It is an arithmetic number, because the mean of its divisors is an integer number (330684852).

Almost surely, 2^661369703 is an apocalyptic number.

661369703 is a deficient number, since it is larger than the sum of its proper divisors (1).

661369703 is an equidigital number, since it uses as much as digits as its factorization.

661369703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 41.

The square root of 661369703 is about 25717.1091493581. The cubic root of 661369703 is about 871.2606478612.

The spelling of 661369703 in words is "six hundred sixty-one million, three hundred sixty-nine thousand, seven hundred three".