6651650 has 12 divisors (see below), whose sum is σ = 12372162. Its totient is φ = 2660640.

The previous prime is 6651649. The next prime is 6651661. The reversal of 6651650 is 561566.

It can be written as a sum of positive squares in 3 ways, for example, as 2758921 + 3892729 = 1661^2 + 1973^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66467 + ... + 66566.

Almost surely, 2^6651650 is an apocalyptic number.

6651650 is a deficient number, since it is larger than the sum of its proper divisors (5720512).

6651650 is a wasteful number, since it uses less digits than its factorization.

6651650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133045 (or 133040 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 6651650 is about 2579.0792930812. The cubic root of 6651650 is about 188.0657872976.

It can be divided in two parts, 66516 and 50, that added together give a palindrome (66566).

The spelling of 6651650 in words is "six million, six hundred fifty-one thousand, six hundred fifty".