766662547213 has 2 divisors, whose sum is σ = 766662547214. Its totient is φ = 766662547212.

The previous prime is 766662547193. The next prime is 766662547243. The reversal of 766662547213 is 312745266667.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 766426709764 + 235837449 = 875458^2 + 15357^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-766662547213 is a prime.

It is a super-2 number, since 2×766662547213² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (766662547243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383331273606 + 383331273607.

It is an arithmetic number, because the mean of its divisors is an integer number (383331273607).

Almost surely, 2^766662547213 is an apocalyptic number.

It is an amenable number.

766662547213 is a deficient number, since it is larger than the sum of its proper divisors (1).

766662547213 is an equidigital number, since it uses as much as digits as its factorization.

766662547213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15240960, while the sum is 55.

The spelling of 766662547213 in words is "seven hundred sixty-six billion, six hundred sixty-two million, five hundred forty-seven thousand, two hundred thirteen".