766234057481 has 4 divisors (see below), whose sum is σ = 766236839700. Its totient is φ = 766231275264.

The previous prime is 766234057439. The next prime is 766234057483. The reversal of 766234057481 is 184750432667.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 184750432667 = 277 ⋅666969071.

It can be written as a sum of positive squares in 2 ways, for example, as 364139833600 + 402094223881 = 603440^2 + 634109^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-766234057481 is a prime.

It is a super-2 number, since 2×766234057481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (766234057483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 926216 + ... + 1546073.

It is an arithmetic number, because the mean of its divisors is an integer number (191559209925).

Almost surely, 2^766234057481 is an apocalyptic number.

It is an amenable number.

766234057481 is a deficient number, since it is larger than the sum of its proper divisors (2782219).

766234057481 is a wasteful number, since it uses less digits than its factorization.

766234057481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2782218.

The product of its (nonzero) digits is 6773760, while the sum is 53.

The spelling of 766234057481 in words is "seven hundred sixty-six billion, two hundred thirty-four million, fifty-seven thousand, four hundred eighty-one".