666233437 has 2 divisors, whose sum is σ = 666233438. Its totient is φ = 666233436.

The previous prime is 666233317. The next prime is 666233453. The reversal of 666233437 is 734332666.

It is the 10538-th star number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 586559961 + 79673476 = 24219^2 + 8926^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666233437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 666233437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666233497) 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, 333116718 + 333116719.

It is an arithmetic number, because the mean of its divisors is an integer number (333116719).

Almost surely, 2^666233437 is an apocalyptic number.

It is an amenable number.

666233437 is a deficient number, since it is larger than the sum of its proper divisors (1).

666233437 is an equidigital number, since it uses as much as digits as its factorization.

666233437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 40.

The square root of 666233437 is about 25811.4981548921. The cubic root of 666233437 is about 873.3911932446.

The spelling of 666233437 in words is "six hundred sixty-six million, two hundred thirty-three thousand, four hundred thirty-seven".