723072665 has 24 divisors (see below), whose sum is σ = 1023202440. Its totient is φ = 489017088.

The previous prime is 723072661. The next prime is 723072673. The reversal of 723072665 is 566270327.

723072665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 212809744 + 510262921 = 14588^2 + 22589^2 .

It is not a de Polignac number, because 723072665 - 2² = 723072661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (723072661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2330 + ... + 38099.

It is an arithmetic number, because the mean of its divisors is an integer number (42633435).

Almost surely, 2^723072665 is an apocalyptic number.

It is an amenable number.

723072665 is a deficient number, since it is larger than the sum of its proper divisors (300129775).

723072665 is a wasteful number, since it uses less digits than its factorization.

723072665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40521 (or 40514 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 38.

The square root of 723072665 is about 26890.0105057622. The cubic root of 723072665 is about 897.5541265143.

The spelling of 723072665 in words is "seven hundred twenty-three million, seventy-two thousand, six hundred sixty-five".