726621332766 has 16 divisors (see below), whose sum is σ = 1660848760704. Its totient is φ = 207606095064.

The previous prime is 726621332743. The next prime is 726621332791. The reversal of 726621332766 is 667233126627.

It is a super-4 number, since 4×726621332766⁴ (a number of 49 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

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, 8650253920 + ... + 8650254003.

It is an arithmetic number, because the mean of its divisors is an integer number (103803047544).

Almost surely, 2^726621332766 is an apocalyptic number.

726621332766 is an abundant number, since it is smaller than the sum of its proper divisors (934227427938).

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

726621332766 is a wasteful number, since it uses less digits than its factorization.

726621332766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17300507935.

The product of its digits is 4572288, while the sum is 51.

The spelling of 726621332766 in words is "seven hundred twenty-six billion, six hundred twenty-one million, three hundred thirty-two thousand, seven hundred sixty-six".