6499866601 has 8 divisors (see below), whose sum is σ = 6578137440. Its totient is φ = 6421712352.

The previous prime is 6499866517. The next prime is 6499866623. The reversal of 6499866601 is 1066689946.

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 6499866601 - 2²¹ = 6497769449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6499866301) 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, 85726 + ... + 142648.

It is an arithmetic number, because the mean of its divisors is an integer number (822267180).

Almost surely, 2^6499866601 is an apocalyptic number.

It is an amenable number.

6499866601 is a deficient number, since it is larger than the sum of its proper divisors (78270839).

6499866601 is a wasteful number, since it uses less digits than its factorization.

6499866601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58295.

The product of its (nonzero) digits is 3359232, while the sum is 55.

The square root of 6499866601 is about 80621.7501732628. The cubic root of 6499866601 is about 1866.2428113147.

The spelling of 6499866601 in words is "six billion, four hundred ninety-nine million, eight hundred sixty-six thousand, six hundred one".