766555117457 has 2 divisors, whose sum is σ = 766555117458. Its totient is φ = 766555117456.

The previous prime is 766555117453. The next prime is 766555117621. The reversal of 766555117457 is 754711555667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 734365016401 + 32190101056 = 856951^2 + 179416^2 .

It is a cyclic number.

It is not a de Polignac number, because 766555117457 - 2² = 766555117453 is a prime.

It is a super-2 number, since 2×766555117457² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 766555117396 and 766555117405.

It is not a weakly prime, because it can be changed into another prime (766555117453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383277558728 + 383277558729.

It is an arithmetic number, because the mean of its divisors is an integer number (383277558729).

Almost surely, 2^766555117457 is an apocalyptic number.

It is an amenable number.

766555117457 is a deficient number, since it is larger than the sum of its proper divisors (1).

766555117457 is an equidigital number, since it uses as much as digits as its factorization.

766555117457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30870000, while the sum is 59.

The spelling of 766555117457 in words is "seven hundred sixty-six billion, five hundred fifty-five million, one hundred seventeen thousand, four hundred fifty-seven".