6783400667279 has 8 divisors (see below), whose sum is σ = 6816999555072. Its totient is φ = 6749830173240.

The previous prime is 6783400667243. The next prime is 6783400667287. The reversal of 6783400667279 is 9727660043876.

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

It is a cyclic number.

It is not a de Polignac number, because 6783400667279 - 2⁸ = 6783400667023 is a prime.

It is a super-2 number, since 2×6783400667279² (a number of 26 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 (6783400667779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6619367 + ... + 7575144.

It is an arithmetic number, because the mean of its divisors is an integer number (852124944384).

Almost surely, 2^{6783400667279} is an apocalyptic number.

6783400667279 is a deficient number, since it is larger than the sum of its proper divisors (33598887793).

6783400667279 is a wasteful number, since it uses less digits than its factorization.

6783400667279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14196877.

The product of its (nonzero) digits is 128024064, while the sum is 65.

The spelling of 6783400667279 in words is "six trillion, seven hundred eighty-three billion, four hundred million, six hundred sixty-seven thousand, two hundred seventy-nine".