766480091591 has 4 divisors (see below), whose sum is σ = 769769705952. Its totient is φ = 763190477232.

The previous prime is 766480091567. The next prime is 766480091593. The reversal of 766480091591 is 195190084667.

766480091591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 195190084667 = 79231 ⋅2463557.

It is a cyclic number.

It is not a de Polignac number, because 766480091591 - 2⁶ = 766480091527 is a prime.

It is a super-2 number, since 2×766480091591² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766480091593) 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, 1644806831 + ... + 1644807296.

It is an arithmetic number, because the mean of its divisors is an integer number (192442426488).

Almost surely, 2^766480091591 is an apocalyptic number.

766480091591 is a deficient number, since it is larger than the sum of its proper divisors (3289614361).

766480091591 is a wasteful number, since it uses less digits than its factorization.

766480091591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3289614360.

The product of its (nonzero) digits is 3265920, while the sum is 56.

The spelling of 766480091591 in words is "seven hundred sixty-six billion, four hundred eighty million, ninety-one thousand, five hundred ninety-one".