6647770 has 8 divisors (see below), whose sum is σ = 11966004. Its totient is φ = 2659104.

The previous prime is 6647761. The next prime is 6647779. The reversal of 6647770 is 777466.

It is an interprime number because it is at equal distance from previous prime (6647761) and next prime (6647779).

It can be written as a sum of positive squares in 2 ways, for example, as 6335289 + 312481 = 2517^2 + 559^2 .

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

It is not an unprimeable number, because it can be changed into a prime (6647779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332379 + ... + 332398.

Almost surely, 2^6647770 is an apocalyptic number.

6647770 is a deficient number, since it is larger than the sum of its proper divisors (5318234).

6647770 is a wasteful number, since it uses less digits than its factorization.

6647770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664784.

The product of its (nonzero) digits is 49392, while the sum is 37.

The square root of 6647770 is about 2578.3269769368. The cubic root of 6647770 is about 188.0292130551.

The spelling of 6647770 in words is "six million, six hundred forty-seven thousand, seven hundred seventy".