6766287378399 has 40 divisors (see below), whose sum is σ = 10124416586592. Its totient is φ = 4503385512000.

The previous prime is 6766287378287. The next prime is 6766287378427. The reversal of 6766287378399 is 9938737826676.

6766287378399 is a `hidden beast` number, since 6 + 76 + 6 + 28 + 73 + 78 + 399 = 666.

It is not a de Polignac number, because 6766287378399 - 2⁹ = 6766287377887 is a prime.

It is a super-2 number, since 2×6766287378399² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6766287378199) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 229343149 + ... + 229372649.

Almost surely, 2^{6766287378399} is an apocalyptic number.

6766287378399 is a deficient number, since it is larger than the sum of its proper divisors (3358129208193).

6766287378399 is a wasteful number, since it uses less digits than its factorization.

6766287378399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34109 (or 34100 counting only the distinct ones).

The product of its digits is 6913299456, while the sum is 81.

The spelling of 6766287378399 in words is "six trillion, seven hundred sixty-six billion, two hundred eighty-seven million, three hundred seventy-eight thousand, three hundred ninety-nine".