6631985 has 8 divisors (see below), whose sum is σ = 8215296. Its totient is φ = 5134320.

The previous prime is 6631979. The next prime is 6631993. The reversal of 6631985 is 5891366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6631985 - 2¹⁰ = 6630961 is a prime.

It is a Duffinian 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, 21239 + ... + 21548.

It is an arithmetic number, because the mean of its divisors is an integer number (1026912).

Almost surely, 2^6631985 is an apocalyptic number.

It is an amenable number.

6631985 is a deficient number, since it is larger than the sum of its proper divisors (1583311).

6631985 is a wasteful number, since it uses less digits than its factorization.

6631985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42823.

The product of its digits is 38880, while the sum is 38.

The square root of 6631985 is about 2575.2640641301. The cubic root of 6631985 is about 187.8802712086.

The spelling of 6631985 in words is "six million, six hundred thirty-one thousand, nine hundred eighty-five".