766661473 has 2 divisors, whose sum is σ = 766661474. Its totient is φ = 766661472.

The previous prime is 766661411. The next prime is 766661477. The reversal of 766661473 is 374166667.

766661473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 603537489 + 163123984 = 24567^2 + 12772^2 .

It is a cyclic number.

It is not a de Polignac number, because 766661473 - 2²⁵ = 733107041 is a prime.

It is not a weakly prime, because it can be changed into another prime (766661477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383330736 + 383330737.

It is an arithmetic number, because the mean of its divisors is an integer number (383330737).

Almost surely, 2^766661473 is an apocalyptic number.

It is an amenable number.

766661473 is a deficient number, since it is larger than the sum of its proper divisors (1).

766661473 is an equidigital number, since it uses as much as digits as its factorization.

766661473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 46.

The square root of 766661473 is about 27688.6524229692. The cubic root of 766661473 is about 915.2390600338.

The spelling of 766661473 in words is "seven hundred sixty-six million, six hundred sixty-one thousand, four hundred seventy-three".