6640046 has 8 divisors (see below), whose sum is σ = 11382960. Its totient is φ = 2845728.

The previous prime is 6640027. The next prime is 6640061. The reversal of 6640046 is 6400466.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6639997 and 6640024.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237131 + ... + 237158.

It is an arithmetic number, because the mean of its divisors is an integer number (1422870).

Almost surely, 2^6640046 is an apocalyptic number.

6640046 is a deficient number, since it is larger than the sum of its proper divisors (4742914).

6640046 is a wasteful number, since it uses less digits than its factorization.

6640046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474298.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 6640046 is about 2576.8286710606. The cubic root of 6640046 is about 187.9563615328.

The spelling of 6640046 in words is "six million, six hundred forty thousand, forty-six".