276620066650657 has 2 divisors, whose sum is σ = 276620066650658. Its totient is φ = 276620066650656.

The previous prime is 276620066650649. The next prime is 276620066650691. The reversal of 276620066650657 is 756056660026672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 269742224716561 + 6877841934096 = 16423831^2 + 2622564^2 .

It is a cyclic number.

It is not a de Polignac number, because 276620066650657 - 2³ = 276620066650649 is a prime.

It is a super-2 number, since 2×276620066650657² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (276620066650357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138310033325328 + 138310033325329.

It is an arithmetic number, because the mean of its divisors is an integer number (138310033325329).

Almost surely, 2^{276620066650657} is an apocalyptic number.

It is an amenable number.

276620066650657 is a deficient number, since it is larger than the sum of its proper divisors (1).

276620066650657 is an equidigital number, since it uses as much as digits as its factorization.

276620066650657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 228614400, while the sum is 64.

The spelling of 276620066650657 in words is "two hundred seventy-six trillion, six hundred twenty billion, sixty-six million, six hundred fifty thousand, six hundred fifty-seven".