73661661701 has 2 divisors, whose sum is σ = 73661661702. Its totient is φ = 73661661700.

The previous prime is 73661661629. The next prime is 73661661727. The reversal of 73661661701 is 10716616637.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61292885476 + 12368776225 = 247574^2 + 111215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73661661701 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73661661791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36830830850 + 36830830851.

It is an arithmetic number, because the mean of its divisors is an integer number (36830830851).

Almost surely, 2^73661661701 is an apocalyptic number.

It is an amenable number.

73661661701 is a deficient number, since it is larger than the sum of its proper divisors (1).

73661661701 is an equidigital number, since it uses as much as digits as its factorization.

73661661701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 44.

The spelling of 73661661701 in words is "seventy-three billion, six hundred sixty-one million, six hundred sixty-one thousand, seven hundred one".