6778014407 has 4 divisors (see below), whose sum is σ = 6778369080. Its totient is φ = 6777659736.

The previous prime is 6778014377. The next prime is 6778014409. The reversal of 6778014407 is 7044108776.

It is a happy number.

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 6778014407 - 2¹⁶ = 6777948871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6778014409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146933 + ... + 187470.

It is an arithmetic number, because the mean of its divisors is an integer number (1694592270).

Almost surely, 2^6778014407 is an apocalyptic number.

6778014407 is a deficient number, since it is larger than the sum of its proper divisors (354673).

6778014407 is a wasteful number, since it uses less digits than its factorization.

6778014407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354672.

The product of its (nonzero) digits is 263424, while the sum is 44.

The square root of 6778014407 is about 82328.6973478871. The cubic root of 6778014407 is about 1892.4924803223.

The spelling of 6778014407 in words is "six billion, seven hundred seventy-eight million, fourteen thousand, four hundred seven".