6663500461 has 4 divisors (see below), whose sum is σ = 6818465632. Its totient is φ = 6508535292.

The previous prime is 6663500443. The next prime is 6663500471. The reversal of 6663500461 is 1640053666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6663500461 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 6663500461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6663500401) 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, 77482521 + ... + 77482606.

It is an arithmetic number, because the mean of its divisors is an integer number (1704616408).

Almost surely, 2^6663500461 is an apocalyptic number.

It is an amenable number.

6663500461 is a deficient number, since it is larger than the sum of its proper divisors (154965171).

6663500461 is a wasteful number, since it uses less digits than its factorization.

6663500461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154965170.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 6663500461 is about 81630.2668193606. The cubic root of 6663500461 is about 1881.7740592201.

The spelling of 6663500461 in words is "six billion, six hundred sixty-three million, five hundred thousand, four hundred sixty-one".