6503645066 has 8 divisors (see below), whose sum is σ = 9770929824. Its totient is φ = 3246668460.

The previous prime is 6503645063. The next prime is 6503645081. The reversal of 6503645066 is 6605463056.

It is a happy number.

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

It is a super-2 number, since 2×6503645066² = 84594798289012288712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6503645063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2575460 + ... + 2577983.

It is an arithmetic number, because the mean of its divisors is an integer number (1221366228).

Almost surely, 2^6503645066 is an apocalyptic number.

6503645066 is a deficient number, since it is larger than the sum of its proper divisors (3267284758).

6503645066 is a wasteful number, since it uses less digits than its factorization.

6503645066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5154076.

The product of its (nonzero) digits is 388800, while the sum is 41.

The square root of 6503645066 is about 80645.1800543591. The cubic root of 6503645066 is about 1866.6043657708.

The spelling of 6503645066 in words is "six billion, five hundred three million, six hundred forty-five thousand, sixty-six".