666370 has 16 divisors (see below), whose sum is σ = 1232568. Its totient is φ = 259200.

The previous prime is 666353. The next prime is 666403. The reversal of 666370 is 73666.

It can be written as a sum of positive squares in 4 ways, for example, as 543169 + 123201 = 737^2 + 351^2 .

It is a plaindrome in base 14.

It is an unprimeable number.

666370 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 in 7 ways as a sum of consecutive naturals, for example, 531 + ... + 1270.

2⁶⁶⁶³⁷⁰ is an apocalyptic number.

666370 is a deficient number, since it is larger than the sum of its proper divisors (566198).

666370 is a wasteful number, since it uses less digits than its factorization.

666370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 666370 is about 816.3148902231. The cubic root of 666370 is about 87.3450864408.

Subtracting from 666370 its reverse (73666), we obtain a cube (592704 = 84³).

The spelling of 666370 in words is "six hundred sixty-six thousand, three hundred seventy".