766719917633 has 2 divisors, whose sum is σ = 766719917634. Its totient is φ = 766719917632.

The previous prime is 766719917611. The next prime is 766719917681. The reversal of 766719917633 is 336719917667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 762038210704 + 4681706929 = 872948^2 + 68423^2 .

It is a cyclic number.

It is not a de Polignac number, because 766719917633 - 2¹⁸ = 766719655489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 766719917633.

It is not a weakly prime, because it can be changed into another prime (766719917233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383359958816 + 383359958817.

It is an arithmetic number, because the mean of its divisors is an integer number (383359958817).

Almost surely, 2^766719917633 is an apocalyptic number.

It is an amenable number.

766719917633 is a deficient number, since it is larger than the sum of its proper divisors (1).

766719917633 is an equidigital number, since it uses as much as digits as its factorization.

766719917633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54010152, while the sum is 65.

The spelling of 766719917633 in words is "seven hundred sixty-six billion, seven hundred nineteen million, nine hundred seventeen thousand, six hundred thirty-three".