6640951 has 8 divisors (see below), whose sum is σ = 6973920. Its totient is φ = 6311712.

The previous prime is 6640939. The next prime is 6640967. The reversal of 6640951 is 1590466.

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 6640951 - 2¹¹ = 6638903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3145 + ... + 4813.

It is an arithmetic number, because the mean of its divisors is an integer number (871740).

Almost surely, 2^6640951 is an apocalyptic number.

6640951 is a deficient number, since it is larger than the sum of its proper divisors (332969).

6640951 is a wasteful number, since it uses less digits than its factorization.

6640951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1865.

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

The square root of 6640951 is about 2577.0042685258. The cubic root of 6640951 is about 187.9649002678.

The spelling of 6640951 in words is "six million, six hundred forty thousand, nine hundred fifty-one".