766637233 has 2 divisors, whose sum is σ = 766637234. Its totient is φ = 766637232.

The previous prime is 766637227. The next prime is 766637237. The reversal of 766637233 is 332736667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 759939489 + 6697744 = 27567^2 + 2588^2 .

It is an emirp because it is prime and its reverse (332736667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 766637233 - 2¹⁷ = 766506161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 766637233.

It is not a weakly prime, because it can be changed into another prime (766637237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383318616 + 383318617.

It is an arithmetic number, because the mean of its divisors is an integer number (383318617).

Almost surely, 2^766637233 is an apocalyptic number.

It is an amenable number.

766637233 is a deficient number, since it is larger than the sum of its proper divisors (1).

766637233 is an equidigital number, since it uses as much as digits as its factorization.

766637233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 43.

The square root of 766637233 is about 27688.2146950648. The cubic root of 766637233 is about 915.2294140430.

The spelling of 766637233 in words is "seven hundred sixty-six million, six hundred thirty-seven thousand, two hundred thirty-three".