766662547247 has 2 divisors, whose sum is σ = 766662547248. Its totient is φ = 766662547246.

The previous prime is 766662547243. The next prime is 766662547307. The reversal of 766662547247 is 742745266667.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 766662547247 - 2² = 766662547243 is a prime.

It is a super-2 number, since 2×766662547247² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 766662547247.

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, 383331273623 + 383331273624.

It is an arithmetic number, because the mean of its divisors is an integer number (383331273624).

Almost surely, 2^766662547247 is an apocalyptic number.

766662547247 is a deficient number, since it is larger than the sum of its proper divisors (1).

766662547247 is an equidigital number, since it uses as much as digits as its factorization.

766662547247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 142248960, while the sum is 62.

The spelling of 766662547247 in words is "seven hundred sixty-six billion, six hundred sixty-two million, five hundred forty-seven thousand, two hundred forty-seven".