666532402 has 8 divisors (see below), whose sum is σ = 999938412. Its totient is φ = 333219600.

The previous prime is 666532397. The next prime is 666532403. The reversal of 666532402 is 204235666.

It can be written as a sum of positive squares in 2 ways, for example, as 626450841 + 40081561 = 25029^2 + 6331^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (666532403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1249 + ... + 36532.

Almost surely, 2^666532402 is an apocalyptic number.

666532402 is a deficient number, since it is larger than the sum of its proper divisors (333406010).

666532402 is a wasteful number, since it uses less digits than its factorization.

666532402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46604.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 666532402 is about 25817.2888197037. The cubic root of 666532402 is about 873.5218153039.

The spelling of 666532402 in words is "six hundred sixty-six million, five hundred thirty-two thousand, four hundred two".