6646763 has 4 divisors (see below), whose sum is σ = 6759480. Its totient is φ = 6534048.

The previous prime is 6646699. The next prime is 6646769. The reversal of 6646763 is 3676466.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3676466 = 2 ⋅1838233.

It is a cyclic number.

It is not a de Polignac number, because 6646763 - 2⁶ = 6646699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6646769) 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, 56270 + ... + 56387.

It is an arithmetic number, because the mean of its divisors is an integer number (1689870).

Almost surely, 2^6646763 is an apocalyptic number.

6646763 is a deficient number, since it is larger than the sum of its proper divisors (112717).

6646763 is a wasteful number, since it uses less digits than its factorization.

6646763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112716.

The product of its digits is 108864, while the sum is 38.

The square root of 6646763 is about 2578.1316878701. The cubic root of 6646763 is about 188.0197183935.

The spelling of 6646763 in words is "six million, six hundred forty-six thousand, seven hundred sixty-three".