722666 has 16 divisors (see below), whose sum is σ = 1270080.
Its totient is φ = 301920.
The previous prime is 722663. The next prime is 722669. The reversal of 722666 is 666227.
722666 = 14 + 24 + ... + 204.
722666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is an interprime number because it is at equal distance from previous prime (722663) and next prime (722669).
It is a super-2 number, since 2×7226662 = 1044492295112, which contains 22 as substring.
It is a Curzon number.
It is not an unprimeable number, because it can be changed into a prime (722663) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56 + ... + 1203.
It is an arithmetic number, because the mean of its divisors is an integer number (79380).
2722666 is an apocalyptic number.
722666 is a deficient number, since it is larger than the sum of its proper divisors (547414).
722666 is a wasteful number, since it uses less digits than its factorization.
722666 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1309.
The product of its digits is 6048, while the sum is 29.
The square root of 722666 is about 850.0976414507.
The cubic root of 722666 is about 89.7385829783.
The spelling of 722666 in words is "seven hundred twenty-two thousand, six hundred sixty-six".