766400781323 has 8 divisors (see below), whose sum is σ = 804816332448. Its totient is φ = 728409711744.

The previous prime is 766400781253. The next prime is 766400781371. The reversal of 766400781323 is 323187004667.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-766400781323 is a prime.

It is a super-2 number, since 2×766400781323² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (766400781373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106116686 + ... + 106123907.

It is an arithmetic number, because the mean of its divisors is an integer number (100602041556).

Almost surely, 2^766400781323 is an apocalyptic number.

766400781323 is a deficient number, since it is larger than the sum of its proper divisors (38415551125).

766400781323 is a wasteful number, since it uses less digits than its factorization.

766400781323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212240773.

The product of its (nonzero) digits is 1016064, while the sum is 47.

The spelling of 766400781323 in words is "seven hundred sixty-six billion, four hundred million, seven hundred eighty-one thousand, three hundred twenty-three".