6478771 has 4 divisors (see below), whose sum is σ = 6977152. Its totient is φ = 5980392.

The previous prime is 6478763. The next prime is 6478777. The reversal of 6478771 is 1778746.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1778746 = 2 ⋅889373.

It is a cyclic number.

It is not a de Polignac number, because 6478771 - 2³ = 6478763 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6478777) 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, 249171 + ... + 249196.

It is an arithmetic number, because the mean of its divisors is an integer number (1744288).

Almost surely, 2^6478771 is an apocalyptic number.

6478771 is a deficient number, since it is larger than the sum of its proper divisors (498381).

6478771 is a wasteful number, since it uses less digits than its factorization.

6478771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498380.

The product of its digits is 65856, while the sum is 40.

The square root of 6478771 is about 2545.3430024262. The cubic root of 6478771 is about 186.4221632270.

The spelling of 6478771 in words is "six million, four hundred seventy-eight thousand, seven hundred seventy-one".