6777826709421 has 8 divisors (see below), whose sum is σ = 9047022263424. Its totient is φ = 4513591147520.

The previous prime is 6777826709371. The next prime is 6777826709429. The reversal of 6777826709421 is 1249076287776.

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 6777826709421 - 2⁷ = 6777826709293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6777826709429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1239994836 + ... + 1240000301.

It is an arithmetic number, because the mean of its divisors is an integer number (1130877782928).

Almost surely, 2^{6777826709421} is an apocalyptic number.

It is an amenable number.

6777826709421 is a deficient number, since it is larger than the sum of its proper divisors (2269195554003).

6777826709421 is a wasteful number, since it uses less digits than its factorization.

6777826709421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2479996051.

The product of its (nonzero) digits is 99574272, while the sum is 66.

The spelling of 6777826709421 in words is "six trillion, seven hundred seventy-seven billion, eight hundred twenty-six million, seven hundred nine thousand, four hundred twenty-one".