766473322157 has 4 divisors (see below), whose sum is σ = 766475355516. Its totient is φ = 766471288800.

The previous prime is 766473322151. The next prime is 766473322243. The reversal of 766473322157 is 751223374667.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 751223374667 = 39419 ⋅19057393.

It can be written as a sum of positive squares in 2 ways, for example, as 427436133796 + 339037188361 = 653786^2 + 582269^2 .

It is a cyclic number.

It is not a de Polignac number, because 766473322157 - 2⁶ = 766473322093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 766473322099 and 766473322108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766473322151) 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, 266978 + ... + 1266579.

It is an arithmetic number, because the mean of its divisors is an integer number (191618838879).

Almost surely, 2^766473322157 is an apocalyptic number.

It is an amenable number.

766473322157 is a deficient number, since it is larger than the sum of its proper divisors (2033359).

766473322157 is a wasteful number, since it uses less digits than its factorization.

766473322157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033358.

The product of its digits is 8890560, while the sum is 53.

The spelling of 766473322157 in words is "seven hundred sixty-six billion, four hundred seventy-three million, three hundred twenty-two thousand, one hundred fifty-seven".