2665242439477 has 2 divisors, whose sum is σ = 2665242439478. Its totient is φ = 2665242439476.

The previous prime is 2665242439417. The next prime is 2665242439487. The reversal of 2665242439477 is 7749342425662.

2665242439477 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2640215515876 + 25026923601 = 1624874^2 + 158199^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2665242439477 is a prime.

It is a super-2 number, since 2×2665242439477² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2665242439417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332621219738 + 1332621219739.

It is an arithmetic number, because the mean of its divisors is an integer number (1332621219739).

Almost surely, 2^{2665242439477} is an apocalyptic number.

It is an amenable number.

2665242439477 is a deficient number, since it is larger than the sum of its proper divisors (1).

2665242439477 is an equidigital number, since it uses as much as digits as its factorization.

2665242439477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 121927680, while the sum is 61.

The spelling of 2665242439477 in words is "two trillion, six hundred sixty-five billion, two hundred forty-two million, four hundred thirty-nine thousand, four hundred seventy-seven".