666455539 has 8 divisors (see below), whose sum is σ = 712134720. Its totient is φ = 621495936.

The previous prime is 666455519. The next prime is 666455593. The reversal of 666455539 is 935554666.

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

It is a cyclic number.

It is not a de Polignac number, because 666455539 - 2¹⁹ = 665931251 is a prime.

It is a super-3 number, since 3×666455539³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666455492 and 666455501.

It is not an unprimeable number, because it can be changed into a prime (666455509) 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 in 7 ways as a sum of consecutive naturals, for example, 177979 + ... + 181684.

It is an arithmetic number, because the mean of its divisors is an integer number (89016840).

Almost surely, 2^666455539 is an apocalyptic number.

666455539 is a deficient number, since it is larger than the sum of its proper divisors (45679181).

666455539 is a wasteful number, since it uses less digits than its factorization.

666455539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359789.

The product of its digits is 2916000, while the sum is 49.

The square root of 666455539 is about 25815.8001812843. The cubic root of 666455539 is about 873.4882364971.

The spelling of 666455539 in words is "six hundred sixty-six million, four hundred fifty-five thousand, five hundred thirty-nine".