6466678 has 4 divisors (see below), whose sum is σ = 9700020. Its totient is φ = 3233338.

The previous prime is 6466661. The next prime is 6466679. The reversal of 6466678 is 8766646.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6466679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1616668 + ... + 1616671.

It is an arithmetic number, because the mean of its divisors is an integer number (2425005).

Almost surely, 2^6466678 is an apocalyptic number.

6466678 is a deficient number, since it is larger than the sum of its proper divisors (3233342).

6466678 is a wasteful number, since it uses less digits than its factorization.

6466678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3233341.

The product of its digits is 290304, while the sum is 43.

The square root of 6466678 is about 2542.9663780711. The cubic root of 6466678 is about 186.3061017428.

Subtracting 6466678 from its reverse (8766646), we obtain a cube (2299968 = 132³).

The spelling of 6466678 in words is "six million, four hundred sixty-six thousand, six hundred seventy-eight".