6640739230 has 16 divisors (see below), whose sum is σ = 11961268704. Its totient is φ = 2654531680.

The previous prime is 6640739221. The next prime is 6640739293. The reversal of 6640739230 is 329370466.

It is a congruent 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, 204637 + ... + 234856.

It is an arithmetic number, because the mean of its divisors is an integer number (747579294).

Almost surely, 2^6640739230 is an apocalyptic number.

6640739230 is a deficient number, since it is larger than the sum of its proper divisors (5320529474).

6640739230 is a wasteful number, since it uses less digits than its factorization.

6640739230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441011.

The product of its (nonzero) digits is 163296, while the sum is 40.

The square root of 6640739230 is about 81490.7309453044. The cubic root of 6640739230 is about 1879.6290227338.

The spelling of 6640739230 in words is "six billion, six hundred forty million, seven hundred thirty-nine thousand, two hundred thirty".