6721634 has 8 divisors (see below), whose sum is σ = 10253520. Its totient is φ = 3303796.

The previous prime is 6721609. The next prime is 6721661. The reversal of 6721634 is 4361276.

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

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 6721597 and 6721606.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28364 + ... + 28599.

It is an arithmetic number, because the mean of its divisors is an integer number (1281690).

Almost surely, 2^6721634 is an apocalyptic number.

6721634 is a deficient number, since it is larger than the sum of its proper divisors (3531886).

6721634 is a wasteful number, since it uses less digits than its factorization.

6721634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57024.

The product of its digits is 6048, while the sum is 29.

The square root of 6721634 is about 2592.6114247993. The cubic root of 6721634 is about 188.7230530366.

The spelling of 6721634 in words is "six million, seven hundred twenty-one thousand, six hundred thirty-four".