6623778 has 32 divisors (see below), whose sum is σ = 16032384. Its totient is φ = 1780992.

The previous prime is 6623759. The next prime is 6623789. The reversal of 6623778 is 8773266.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3925 + ... + 5352.

It is an arithmetic number, because the mean of its divisors is an integer number (501012).

Almost surely, 2^6623778 is an apocalyptic number.

6623778 is an abundant number, since it is smaller than the sum of its proper divisors (9408606).

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

6623778 is a wasteful number, since it uses less digits than its factorization.

6623778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9306.

The product of its digits is 84672, while the sum is 39.

The square root of 6623778 is about 2573.6701420345. The cubic root of 6623778 is about 187.8027393753.

The spelling of 6623778 in words is "six million, six hundred twenty-three thousand, seven hundred seventy-eight".