6630781533 has 8 divisors (see below), whose sum is σ = 8886851328. Its totient is φ = 4397616384.

The previous prime is 6630781529. The next prime is 6630781561. The reversal of 6630781533 is 3351870366.

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

It is not a de Polignac number, because 6630781533 - 2² = 6630781529 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6630781523) 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, 5725485 + ... + 5726642.

It is an arithmetic number, because the mean of its divisors is an integer number (1110856416).

Almost surely, 2^6630781533 is an apocalyptic number.

It is an amenable number.

6630781533 is a deficient number, since it is larger than the sum of its proper divisors (2256069795).

6630781533 is a wasteful number, since it uses less digits than its factorization.

6630781533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11452323.

The product of its (nonzero) digits is 272160, while the sum is 42.

The square root of 6630781533 is about 81429.6109102825. The cubic root of 6630781533 is about 1878.6890601475.

The spelling of 6630781533 in words is "six billion, six hundred thirty million, seven hundred eighty-one thousand, five hundred thirty-three".