77373366613 has 2 divisors, whose sum is σ = 77373366614. Its totient is φ = 77373366612.

The previous prime is 77373366611. The next prime is 77373366673. The reversal of 77373366613 is 31666337377.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77071753924 + 301612689 = 277618^2 + 17367^2 .

It is a cyclic number.

It is not a de Polignac number, because 77373366613 - 2¹ = 77373366611 is a prime.

It is a super-2 number, since 2×77373366613² (a number of 23 digits) contains 22 as substring.

Together with 77373366611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77373366611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38686683306 + 38686683307.

It is an arithmetic number, because the mean of its divisors is an integer number (38686683307).

Almost surely, 2^77373366613 is an apocalyptic number.

It is an amenable number.

77373366613 is a deficient number, since it is larger than the sum of its proper divisors (1).

77373366613 is an equidigital number, since it uses as much as digits as its factorization.

77373366613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6001128, while the sum is 52.

The spelling of 77373366613 in words is "seventy-seven billion, three hundred seventy-three million, three hundred sixty-six thousand, six hundred thirteen".