6640195 has 8 divisors (see below), whose sum is σ = 8031744. Its totient is φ = 5269824.

The previous prime is 6640181. The next prime is 6640213. The reversal of 6640195 is 5910466.

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

It is a cyclic number.

It is not a de Polignac number, because 6640195 - 2⁵ = 6640163 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, 4594 + ... + 5863.

It is an arithmetic number, because the mean of its divisors is an integer number (1003968).

Almost surely, 2^6640195 is an apocalyptic number.

6640195 is a deficient number, since it is larger than the sum of its proper divisors (1391549).

6640195 is a wasteful number, since it uses less digits than its factorization.

6640195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10589.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 6640195 is about 2576.8575824054. The cubic root of 6640195 is about 187.9577674111.

The spelling of 6640195 in words is "six million, six hundred forty thousand, one hundred ninety-five".