6650778 has 8 divisors (see below), whose sum is σ = 13301568. Its totient is φ = 2216924.

The previous prime is 6650737. The next prime is 6650797. The reversal of 6650778 is 8770566.

It is a sphenic number, since it is the product of 3 distinct primes.

6650778 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 554226 + ... + 554237.

It is an arithmetic number, because the mean of its divisors is an integer number (1662696).

Almost surely, 2^6650778 is an apocalyptic number.

6650778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6650778 is a wasteful number, since it uses less digits than its factorization.

6650778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108468.

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 6650778 is about 2578.9102349636. The cubic root of 6650778 is about 188.0575687587.

The spelling of 6650778 in words is "six million, six hundred fifty thousand, seven hundred seventy-eight".