577666824961 has 2 divisors, whose sum is σ = 577666824962. Its totient is φ = 577666824960.

The previous prime is 577666824949. The next prime is 577666824971. The reversal of 577666824961 is 169428666775.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 513515560000 + 64151264961 = 716600^2 + 253281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-577666824961 is a prime.

It is a super-2 number, since 2×577666824961² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (577666824941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 288833412480 + 288833412481.

It is an arithmetic number, because the mean of its divisors is an integer number (288833412481).

Almost surely, 2^577666824961 is an apocalyptic number.

It is an amenable number.

577666824961 is a deficient number, since it is larger than the sum of its proper divisors (1).

577666824961 is an equidigital number, since it uses as much as digits as its factorization.

577666824961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 182891520, while the sum is 67.

The spelling of 577666824961 in words is "five hundred seventy-seven billion, six hundred sixty-six million, eight hundred twenty-four thousand, nine hundred sixty-one".