6466878 has 80 divisors (see below), whose sum is σ = 16727040. Its totient is φ = 1846800.

The previous prime is 6466853. The next prime is 6466883. The reversal of 6466878 is 8786646.

It is a happy number.

It is a super-2 number, since 2×6466878² = 83641022133768, which contains 22 as substring.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 33763 + ... + 33953.

It is an arithmetic number, because the mean of its divisors is an integer number (209088).

Almost surely, 2^6466878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6466878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8363520).

6466878 is an abundant number, since it is smaller than the sum of its proper divisors (10260162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6466878 is a wasteful number, since it uses less digits than its factorization.

6466878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 226 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 6466878 is about 2543.0057019205. The cubic root of 6466878 is about 186.3080224011.

It can be divided in two parts, 64668 and 78, that added together give a palindrome (64746).

The spelling of 6466878 in words is "six million, four hundred sixty-six thousand, eight hundred seventy-eight".