6640057029 has 8 divisors (see below), whose sum is σ = 8853804000. Its totient is φ = 4426507376.

The previous prime is 6640057003. The next prime is 6640057031. The reversal of 6640057029 is 9207500466.

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 6640057029 - 2¹³ = 6640048837 is a prime.

It is a super-4 number, since 4×6640057029⁴ (a number of 40 digits) contains 4444 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640057069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71419 + ... + 135575.

It is an arithmetic number, because the mean of its divisors is an integer number (1106725500).

Almost surely, 2^6640057029 is an apocalyptic number.

It is an amenable number.

6640057029 is a deficient number, since it is larger than the sum of its proper divisors (2213746971).

6640057029 is a wasteful number, since it uses less digits than its factorization.

6640057029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98659.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 6640057029 is about 81486.5450795406. The cubic root of 6640057029 is about 1879.5646559685.

The spelling of 6640057029 in words is "six billion, six hundred forty million, fifty-seven thousand, twenty-nine".