6661630 has 16 divisors (see below), whose sum is σ = 12065760. Its totient is φ = 2648032.

The previous prime is 6661601. The next prime is 6661643. The reversal of 6661630 is 361666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325 + ... + 3664.

It is an arithmetic number, because the mean of its divisors is an integer number (754110).

Almost surely, 2^6661630 is an apocalyptic number.

6661630 is a deficient number, since it is larger than the sum of its proper divisors (5404130).

6661630 is a wasteful number, since it uses less digits than its factorization.

6661630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4163.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 6661630 is about 2581.0133668774. The cubic root of 6661630 is about 188.1597969871.

The spelling of 6661630 in words is "six million, six hundred sixty-one thousand, six hundred thirty".