6475778 has 4 divisors (see below), whose sum is σ = 9713670. Its totient is φ = 3237888.

The previous prime is 6475771. The next prime is 6475783. The reversal of 6475778 is 8775746.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4439449 + 2036329 = 2107^2 + 1427^2 .

It is not an unprimeable number, because it can be changed into a prime (6475771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1618943 + ... + 1618946.

Almost surely, 2^6475778 is an apocalyptic number.

6475778 is a deficient number, since it is larger than the sum of its proper divisors (3237892).

6475778 is a wasteful number, since it uses less digits than its factorization.

6475778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3237891.

The product of its digits is 329280, while the sum is 44.

The square root of 6475778 is about 2544.7549980303. The cubic root of 6475778 is about 186.3934516356.

Subtracting 6475778 from its reverse (8775746), we obtain a cube (2299968 = 132³).

The spelling of 6475778 in words is "six million, four hundred seventy-five thousand, seven hundred seventy-eight".