6640137373 has 8 divisors (see below), whose sum is σ = 6663503360. Its totient is φ = 6616812240.

The previous prime is 6640137367. The next prime is 6640137407. The reversal of 6640137373 is 3737310466.

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 6640137373 - 2⁹ = 6640136861 is a prime.

It is a super-2 number, since 2×6640137373² = 88182848664622682258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640137173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335668 + ... + 354898.

It is an arithmetic number, because the mean of its divisors is an integer number (832937920).

Almost surely, 2^6640137373 is an apocalyptic number.

It is an amenable number.

6640137373 is a deficient number, since it is larger than the sum of its proper divisors (23365987).

6640137373 is a wasteful number, since it uses less digits than its factorization.

6640137373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20427.

The product of its (nonzero) digits is 190512, while the sum is 40.

The square root of 6640137373 is about 81487.0380674129. The cubic root of 6640137373 is about 1879.5722367836.

The spelling of 6640137373 in words is "six billion, six hundred forty million, one hundred thirty-seven thousand, three hundred seventy-three".