69616661761 has 2 divisors, whose sum is σ = 69616661762. Its totient is φ = 69616661760.

The previous prime is 69616661759. The next prime is 69616661791. The reversal of 69616661761 is 16716661696.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64752436225 + 4864225536 = 254465^2 + 69744^2 .

It is a cyclic number.

It is not a de Polignac number, because 69616661761 - 2¹ = 69616661759 is a prime.

It is a super-2 number, since 2×69616661761² (a number of 22 digits) contains 22 as substring.

Together with 69616661759, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (69616661701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34808330880 + 34808330881.

It is an arithmetic number, because the mean of its divisors is an integer number (34808330881).

Almost surely, 2^69616661761 is an apocalyptic number.

It is an amenable number.

69616661761 is a deficient number, since it is larger than the sum of its proper divisors (1).

69616661761 is an equidigital number, since it uses as much as digits as its factorization.

69616661761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 55.

The spelling of 69616661761 in words is "sixty-nine billion, six hundred sixteen million, six hundred sixty-one thousand, seven hundred sixty-one".