726684667 has 8 divisors (see below), whose sum is σ = 729690624. Its totient is φ = 723685248.

The previous prime is 726684661. The next prime is 726684677. The reversal of 726684667 is 766486627.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 726684667 - 2¹⁵ = 726651899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726684661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387043 + ... + 388915.

It is an arithmetic number, because the mean of its divisors is an integer number (91211328).

Almost surely, 2^726684667 is an apocalyptic number.

726684667 is a deficient number, since it is larger than the sum of its proper divisors (3005957).

726684667 is a wasteful number, since it uses less digits than its factorization.

726684667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3269.

The product of its digits is 4064256, while the sum is 52.

The square root of 726684667 is about 26957.0893643954. The cubic root of 726684667 is about 899.0461775593.

The spelling of 726684667 in words is "seven hundred twenty-six million, six hundred eighty-four thousand, six hundred sixty-seven".