61466642731517 has 2 divisors, whose sum is σ = 61466642731518. Its totient is φ = 61466642731516.

The previous prime is 61466642731489. The next prime is 61466642731519. The reversal of 61466642731517 is 71513724666416.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58889754169156 + 2576888562361 = 7673966^2 + 1605269^2 .

It is a cyclic number.

It is not a de Polignac number, because 61466642731517 - 2⁸ = 61466642731261 is a prime.

Together with 61466642731519, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61466642731519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30733321365758 + 30733321365759.

It is an arithmetic number, because the mean of its divisors is an integer number (30733321365759).

Almost surely, 2^{61466642731517} is an apocalyptic number.

It is an amenable number.

61466642731517 is a deficient number, since it is larger than the sum of its proper divisors (1).

61466642731517 is an equidigital number, since it uses as much as digits as its factorization.

61466642731517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30481920, while the sum is 59.

The spelling of 61466642731517 in words is "sixty-one trillion, four hundred sixty-six billion, six hundred forty-two million, seven hundred thirty-one thousand, five hundred seventeen".