6666650 has 24 divisors (see below), whose sum is σ = 12496224. Its totient is φ = 2646000.

The previous prime is 6666617. The next prime is 6666679. The reversal of 6666650 is 566666.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 6666650.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7109 + ... + 7991.

It is an arithmetic number, because the mean of its divisors is an integer number (520676).

Almost surely, 2^6666650 is an apocalyptic number.

6666650 is a deficient number, since it is larger than the sum of its proper divisors (5829574).

6666650 is a wasteful number, since it uses less digits than its factorization.

6666650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046 (or 1041 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 6666650 is about 2581.9856699835. The cubic root of 6666650 is about 188.2070489367.

The spelling of 6666650 in words is "six million, six hundred sixty-six thousand, six hundred fifty".