668047 has 2 divisors, whose sum is σ = 668048. Its totient is φ = 668046.

The previous prime is 668033. The next prime is 668051. The reversal of 668047 is 740866.

668047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 668047 - 2¹⁵ = 635279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334023 + 334024.

It is an arithmetic number, because the mean of its divisors is an integer number (334024).

2⁶⁶⁸⁰⁴⁷ is an apocalyptic number.

668047 is a deficient number, since it is larger than the sum of its proper divisors (1).

668047 is an equidigital number, since it uses as much as digits as its factorization.

668047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 668047 is about 817.3414219284. The cubic root of 668047 is about 87.4182965219.

The spelling of 668047 in words is "six hundred sixty-eight thousand, forty-seven".