6630639 has 16 divisors (see below), whose sum is σ = 9463680. Its totient is φ = 4116960.

The previous prime is 6630607. The next prime is 6630641. The reversal of 6630639 is 9360366.

It is not a de Polignac number, because 6630639 - 2⁵ = 6630607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6630539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2524 + ... + 4430.

It is an arithmetic number, because the mean of its divisors is an integer number (591480).

Almost surely, 2^6630639 is an apocalyptic number.

6630639 is a deficient number, since it is larger than the sum of its proper divisors (2833041).

6630639 is a wasteful number, since it uses less digits than its factorization.

6630639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990.

The product of its (nonzero) digits is 17496, while the sum is 33.

The square root of 6630639 is about 2575.0027184452. The cubic root of 6630639 is about 187.8675598833.

The spelling of 6630639 in words is "six million, six hundred thirty thousand, six hundred thirty-nine".