6640597351 has 8 divisors (see below), whose sum is σ = 6812673840. Its totient is φ = 6470713152.

The previous prime is 6640597319. The next prime is 6640597363. The reversal of 6640597351 is 1537950466.

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 6640597351 - 2⁵ = 6640597319 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 (6640592351) 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, 541936 + ... + 554053.

It is an arithmetic number, because the mean of its divisors is an integer number (851584230).

Almost surely, 2^6640597351 is an apocalyptic number.

6640597351 is a deficient number, since it is larger than the sum of its proper divisors (172076489).

6640597351 is a wasteful number, since it uses less digits than its factorization.

6640597351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096145.

The product of its (nonzero) digits is 680400, while the sum is 46.

The square root of 6640597351 is about 81489.8604183367. The cubic root of 6640597351 is about 1879.6156365842.

The spelling of 6640597351 in words is "six billion, six hundred forty million, five hundred ninety-seven thousand, three hundred fifty-one".