766553 has 2 divisors, whose sum is σ = 766554. Its totient is φ = 766552.

The previous prime is 766543. The next prime is 766559. The reversal of 766553 is 355667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 595984 + 170569 = 772^2 + 413^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-766553 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (766559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383276 + 383277.

It is an arithmetic number, because the mean of its divisors is an integer number (383277).

2⁷⁶⁶⁵⁵³ is an apocalyptic number.

It is an amenable number.

766553 is a deficient number, since it is larger than the sum of its proper divisors (1).

766553 is an equidigital number, since it uses as much as digits as its factorization.

766553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18900, while the sum is 32.

The square root of 766553 is about 875.5301251242. The cubic root of 766553 is about 91.5195893042.

The spelling of 766553 in words is "seven hundred sixty-six thousand, five hundred fifty-three".