6640266598 has 32 divisors (see below), whose sum is σ = 11482479360. Its totient is φ = 2821085280.

The previous prime is 6640266587. The next prime is 6640266601. The reversal of 6640266598 is 8956620466.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2894740 + ... + 2897032.

It is an arithmetic number, because the mean of its divisors is an integer number (358827480).

Almost surely, 2^6640266598 is an apocalyptic number.

6640266598 is a deficient number, since it is larger than the sum of its proper divisors (4842212762).

6640266598 is a wasteful number, since it uses less digits than its factorization.

6640266598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4012.

The product of its (nonzero) digits is 3732480, while the sum is 52.

The square root of 6640266598 is about 81487.8309810735. The cubic root of 6640266598 is about 1879.5844296110.

The spelling of 6640266598 in words is "six billion, six hundred forty million, two hundred sixty-six thousand, five hundred ninety-eight".