666334153 has 2 divisors, whose sum is σ = 666334154. Its totient is φ = 666334152.

The previous prime is 666334139. The next prime is 666334157. The reversal of 666334153 is 351433666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 575856009 + 90478144 = 23997^2 + 9512^2 .

It is a cyclic number.

It is not a de Polignac number, because 666334153 - 2⁵ = 666334121 is a prime.

It is not a weakly prime, because it can be changed into another prime (666334157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333167076 + 333167077.

It is an arithmetic number, because the mean of its divisors is an integer number (333167077).

Almost surely, 2^666334153 is an apocalyptic number.

It is an amenable number.

666334153 is a deficient number, since it is larger than the sum of its proper divisors (1).

666334153 is an equidigital number, since it uses as much as digits as its factorization.

666334153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 37.

The square root of 666334153 is about 25813.4490721407. The cubic root of 666334153 is about 873.4352018609.

The spelling of 666334153 in words is "six hundred sixty-six million, three hundred thirty-four thousand, one hundred fifty-three".