722066 has 4 divisors (see below), whose sum is σ = 1083102. Its totient is φ = 361032.

The previous prime is 722063. The next prime is 722069. The reversal of 722066 is 660227.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (722063) and next prime (722069).

It can be written as a sum of positive squares in only one way, i.e., 442225 + 279841 = 665^2 + 529^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 722066.

It is not an unprimeable number, because it can be changed into a prime (722063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180515 + ... + 180518.

2⁷²²⁰⁶⁶ is an apocalyptic number.

722066 is a deficient number, since it is larger than the sum of its proper divisors (361036).

722066 is a wasteful number, since it uses less digits than its factorization.

722066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361035.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 722066 is about 849.7446675325. The cubic root of 722066 is about 89.7137406778.

The spelling of 722066 in words is "seven hundred twenty-two thousand, sixty-six".