6501661223 has 8 divisors (see below), whose sum is σ = 6722488080. Its totient is φ = 6283798720.

The previous prime is 6501661139. The next prime is 6501661249. The reversal of 6501661223 is 3221661056.

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 6501661223 - 2⁸ = 6501660967 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6501661223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6501661273) 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, 736628 + ... + 745401.

It is an arithmetic number, because the mean of its divisors is an integer number (840311010).

Almost surely, 2^6501661223 is an apocalyptic number.

6501661223 is a deficient number, since it is larger than the sum of its proper divisors (220826857).

6501661223 is a wasteful number, since it uses less digits than its factorization.

6501661223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482177.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 6501661223 is about 80632.8792925070. The cubic root of 6501661223 is about 1866.4145529016.

The spelling of 6501661223 in words is "six billion, five hundred one million, six hundred sixty-one thousand, two hundred twenty-three".