6721784634 has 16 divisors (see below), whose sum is σ = 13444827840. Its totient is φ = 2240385120.

The previous prime is 6721784617. The next prime is 6721784659. The reversal of 6721784634 is 4364871276.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26022 + ... + 118830.

It is an arithmetic number, because the mean of its divisors is an integer number (840301740).

Almost surely, 2^6721784634 is an apocalyptic number.

6721784634 is an abundant number, since it is smaller than the sum of its proper divisors (6723043206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6721784634 is a wasteful number, since it uses less digits than its factorization.

6721784634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104885.

The product of its digits is 1354752, while the sum is 48.

The square root of 6721784634 is about 81986.4905578962. The cubic root of 6721784634 is about 1887.2446280766.

The spelling of 6721784634 in words is "six billion, seven hundred twenty-one million, seven hundred eighty-four thousand, six hundred thirty-four".