6466561503 has 8 divisors (see below), whose sum is σ = 8626914048. Its totient is φ = 4308624984.

The previous prime is 6466561477. The next prime is 6466561547. The reversal of 6466561503 is 3051656646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6466561503 - 2⁵ = 6466561471 is a prime.

It is a Smith number, since the sum of its digits (42) 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 not an unprimeable number, because it can be changed into a prime (6466562503) 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, 597751 + ... + 608472.

It is an arithmetic number, because the mean of its divisors is an integer number (1078364256).

Almost surely, 2^6466561503 is an apocalyptic number.

6466561503 is a deficient number, since it is larger than the sum of its proper divisors (2160352545).

6466561503 is a wasteful number, since it uses less digits than its factorization.

6466561503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208013.

The product of its (nonzero) digits is 388800, while the sum is 42.

The square root of 6466561503 is about 80414.9333333057. The cubic root of 6466561503 is about 1863.0498296989.

The spelling of 6466561503 in words is "six billion, four hundred sixty-six million, five hundred sixty-one thousand, five hundred three".