77347067477 has 2 divisors, whose sum is σ = 77347067478. Its totient is φ = 77347067476.

The previous prime is 77347067419. The next prime is 77347067503. The reversal of 77347067477 is 77476074377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47353676881 + 29993390596 = 217609^2 + 173186^2 .

It is a cyclic number.

It is not a de Polignac number, because 77347067477 - 2¹⁰ = 77347066453 is a prime.

It is a super-2 number, since 2×77347067477² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77347067417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38673533738 + 38673533739.

It is an arithmetic number, because the mean of its divisors is an integer number (38673533739).

Almost surely, 2^77347067477 is an apocalyptic number.

It is an amenable number.

77347067477 is a deficient number, since it is larger than the sum of its proper divisors (1).

77347067477 is an equidigital number, since it uses as much as digits as its factorization.

77347067477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33882912, while the sum is 59.

The spelling of 77347067477 in words is "seventy-seven billion, three hundred forty-seven million, sixty-seven thousand, four hundred seventy-seven".