766475451397 has 2 divisors, whose sum is σ = 766475451398. Its totient is φ = 766475451396.

The previous prime is 766475451373. The next prime is 766475451407. The reversal of 766475451397 is 793154574667.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 678186837441 + 88288613956 = 823521^2 + 297134^2 .

It is a cyclic number.

It is not a de Polignac number, because 766475451397 - 2¹⁹ = 766474927109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (766475451317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383237725698 + 383237725699.

It is an arithmetic number, because the mean of its divisors is an integer number (383237725699).

Almost surely, 2^766475451397 is an apocalyptic number.

It is an amenable number.

766475451397 is a deficient number, since it is larger than the sum of its proper divisors (1).

766475451397 is an equidigital number, since it uses as much as digits as its factorization.

766475451397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 133358400, while the sum is 64.

The spelling of 766475451397 in words is "seven hundred sixty-six billion, four hundred seventy-five million, four hundred fifty-one thousand, three hundred ninety-seven".