766288014721 has 4 divisors (see below), whose sum is σ = 766290333744. Its totient is φ = 766285695700.

The previous prime is 766288014719. The next prime is 766288014733. The reversal of 766288014721 is 127410882667.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 127410882667 = 26309 ⋅4842863.

It is a cyclic number.

It is not a de Polignac number, because 766288014721 - 2¹ = 766288014719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (766288014521) 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, 560815 + ... + 1359076.

It is an arithmetic number, because the mean of its divisors is an integer number (191572583436).

Almost surely, 2^766288014721 is an apocalyptic number.

It is an amenable number.

766288014721 is a deficient number, since it is larger than the sum of its proper divisors (2319023).

766288014721 is a wasteful number, since it uses less digits than its factorization.

766288014721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2319022.

The product of its (nonzero) digits is 1806336, while the sum is 52.

The spelling of 766288014721 in words is "seven hundred sixty-six billion, two hundred eighty-eight million, fourteen thousand, seven hundred twenty-one".