666532403 has 2 divisors, whose sum is σ = 666532404. Its totient is φ = 666532402.

The previous prime is 666532397. The next prime is 666532409. The reversal of 666532403 is 304235666.

It is a balanced prime because it is at equal distance from previous prime (666532397) and next prime (666532409).

It is a cyclic number.

It is not a de Polignac number, because 666532403 - 2²⁰ = 665483827 is a prime.

It is not a weakly prime, because it can be changed into another prime (666532409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333266201 + 333266202.

It is an arithmetic number, because the mean of its divisors is an integer number (333266202).

Almost surely, 2^666532403 is an apocalyptic number.

666532403 is a deficient number, since it is larger than the sum of its proper divisors (1).

666532403 is an equidigital number, since it uses as much as digits as its factorization.

666532403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 35.

The square root of 666532403 is about 25817.2888390706. The cubic root of 666532403 is about 873.5218157407.

The spelling of 666532403 in words is "six hundred sixty-six million, five hundred thirty-two thousand, four hundred three".