766705633 has 2 divisors, whose sum is σ = 766705634. Its totient is φ = 766705632.

The previous prime is 766705607. The next prime is 766705637. The reversal of 766705633 is 336507667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 512207424 + 254498209 = 22632^2 + 15953^2 .

It is a cyclic number.

It is not a de Polignac number, because 766705633 - 2¹⁷ = 766574561 is a prime.

It is equal to p_39519664 and since 766705633 and 39519664 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 766705633.

It is not a weakly prime, because it can be changed into another prime (766705637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383352816 + 383352817.

It is an arithmetic number, because the mean of its divisors is an integer number (383352817).

Almost surely, 2^766705633 is an apocalyptic number.

It is an amenable number.

766705633 is a deficient number, since it is larger than the sum of its proper divisors (1).

766705633 is an equidigital number, since it uses as much as digits as its factorization.

766705633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 476280, while the sum is 43.

The square root of 766705633 is about 27689.4498500783. The cubic root of 766705633 is about 915.2566324054.

The spelling of 766705633 in words is "seven hundred sixty-six million, seven hundred five thousand, six hundred thirty-three".