668254033 has 2 divisors, whose sum is σ = 668254034. Its totient is φ = 668254032.

The previous prime is 668253977. The next prime is 668254043. The reversal of 668254033 is 330452866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 668067409 + 186624 = 25847^2 + 432^2 .

It is a cyclic number.

It is not a de Polignac number, because 668254033 - 2²⁹ = 131383121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 668253983 and 668254001.

It is not a weakly prime, because it can be changed into another prime (668254043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334127016 + 334127017.

It is an arithmetic number, because the mean of its divisors is an integer number (334127017).

Almost surely, 2^668254033 is an apocalyptic number.

It is an amenable number.

668254033 is a deficient number, since it is larger than the sum of its proper divisors (1).

668254033 is an equidigital number, since it uses as much as digits as its factorization.

668254033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 668254033 is about 25850.6099154353. The cubic root of 668254033 is about 874.2732612755.

The spelling of 668254033 in words is "six hundred sixty-eight million, two hundred fifty-four thousand, thirty-three".