720666822 has 32 divisors (see below), whose sum is σ = 1527269472. Its totient is φ = 225921024.

The previous prime is 720666809. The next prime is 720666823. The reversal of 720666822 is 228666027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720666823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250818 + ... + 253674.

It is an arithmetic number, because the mean of its divisors is an integer number (47727171).

Almost surely, 2^720666822 is an apocalyptic number.

720666822 is an abundant number, since it is smaller than the sum of its proper divisors (806602650).

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

720666822 is a wasteful number, since it uses less digits than its factorization.

720666822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5352.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 720666822 is about 26845.2383487277. The cubic root of 720666822 is about 896.5575583134.

The spelling of 720666822 in words is "seven hundred twenty million, six hundred sixty-six thousand, eight hundred twenty-two".