6610639 has 8 divisors (see below), whose sum is σ = 7709600. Its totient is φ = 5665968.

The previous prime is 6610621. The next prime is 6610673. The reversal of 6610639 is 9360166.

It is not a de Polignac number, because 6610639 - 2⁵ = 6610607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6610639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6610609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9294 + ... + 9979.

It is an arithmetic number, because the mean of its divisors is an integer number (963700).

Almost surely, 2^6610639 is an apocalyptic number.

6610639 is a deficient number, since it is larger than the sum of its proper divisors (1098961).

6610639 is an equidigital number, since it uses as much as digits as its factorization.

6610639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19294 (or 19280 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 6610639 is about 2571.1162945305. The cubic root of 6610639 is about 187.6784813089.

The spelling of 6610639 in words is "six million, six hundred ten thousand, six hundred thirty-nine".