6656290 has 8 divisors (see below), whose sum is σ = 11981340. Its totient is φ = 2662512.

The previous prime is 6656261. The next prime is 6656291. The reversal of 6656290 is 926566.

It can be written as a sum of positive squares in 2 ways, for example, as 5517801 + 1138489 = 2349^2 + 1067^2 .

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 (6656291) 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, 332805 + ... + 332824.

Almost surely, 2^6656290 is an apocalyptic number.

6656290 is a deficient number, since it is larger than the sum of its proper divisors (5325050).

6656290 is a wasteful number, since it uses less digits than its factorization.

6656290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665636.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 6656290 is about 2579.9786820825. The cubic root of 6656290 is about 188.1095068973.

The spelling of 6656290 in words is "six million, six hundred fifty-six thousand, two hundred ninety".