766668733729 has 2 divisors, whose sum is σ = 766668733730. Its totient is φ = 766668733728.

The previous prime is 766668733681. The next prime is 766668733799. The reversal of 766668733729 is 927337866667.

It is an a-pointer prime, because the next prime (766668733799) can be obtained adding 766668733729 to its sum of digits (70).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 757556122129 + 9112611600 = 870377^2 + 95460^2 .

It is a cyclic number.

It is not a de Polignac number, because 766668733729 - 2¹⁵ = 766668700961 is a prime.

It is not a weakly prime, because it can be changed into another prime (766668733799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383334366864 + 383334366865.

It is an arithmetic number, because the mean of its divisors is an integer number (383334366865).

Almost surely, 2^766668733729 is an apocalyptic number.

It is an amenable number.

766668733729 is a deficient number, since it is larger than the sum of its proper divisors (1).

766668733729 is an equidigital number, since it uses as much as digits as its factorization.

766668733729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576108288, while the sum is 70.

The spelling of 766668733729 in words is "seven hundred sixty-six billion, six hundred sixty-eight million, seven hundred thirty-three thousand, seven hundred twenty-nine".