667553 has 2 divisors, whose sum is σ = 667554. Its totient is φ = 667552.

The previous prime is 667549. The next prime is 667559. The reversal of 667553 is 355766.

667553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 667489 + 64 = 817^2 + 8^2 .

It is a cyclic number.

It is not a de Polignac number, because 667553 - 2² = 667549 is a prime.

It is not a weakly prime, because it can be changed into another prime (667559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333776 + 333777.

It is an arithmetic number, because the mean of its divisors is an integer number (333777).

2⁶⁶⁷⁵⁵³ is an apocalyptic number.

It is an amenable number.

667553 is a deficient number, since it is larger than the sum of its proper divisors (1).

667553 is an equidigital number, since it uses as much as digits as its factorization.

667553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900, while the sum is 32.

The square root of 667553 is about 817.0391667478. The cubic root of 667553 is about 87.3967435037.

The spelling of 667553 in words is "six hundred sixty-seven thousand, five hundred fifty-three".