661294700701 has 2 divisors, whose sum is σ = 661294700702. Its totient is φ = 661294700700.

The previous prime is 661294700687. The next prime is 661294700711. The reversal of 661294700701 is 107007492166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 547792416900 + 113502283801 = 740130^2 + 336901^2 .

It is a cyclic number.

It is not a de Polignac number, because 661294700701 - 2¹¹ = 661294698653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (661294700711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330647350350 + 330647350351.

It is an arithmetic number, because the mean of its divisors is an integer number (330647350351).

Almost surely, 2^661294700701 is an apocalyptic number.

It is an amenable number.

661294700701 is a deficient number, since it is larger than the sum of its proper divisors (1).

661294700701 is an equidigital number, since it uses as much as digits as its factorization.

661294700701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 43.

The spelling of 661294700701 in words is "six hundred sixty-one billion, two hundred ninety-four million, seven hundred thousand, seven hundred one".