766404339863 has 4 divisors (see below), whose sum is σ = 784227696648. Its totient is φ = 748580983080.

The previous prime is 766404339847. The next prime is 766404339917. The reversal of 766404339863 is 368933404667.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 766404339863 - 2⁴ = 766404339847 is a prime.

It is a super-2 number, since 2×766404339863² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766404339263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8911678328 + ... + 8911678413.

It is an arithmetic number, because the mean of its divisors is an integer number (196056924162).

Almost surely, 2^766404339863 is an apocalyptic number.

766404339863 is a deficient number, since it is larger than the sum of its proper divisors (17823356785).

766404339863 is a wasteful number, since it uses less digits than its factorization.

766404339863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17823356784.

The product of its (nonzero) digits is 47029248, while the sum is 59.

The spelling of 766404339863 in words is "seven hundred sixty-six billion, four hundred four million, three hundred thirty-nine thousand, eight hundred sixty-three".