666704498 has 4 divisors (see below), whose sum is σ = 1000056750. Its totient is φ = 333352248.

The previous prime is 666704497. The next prime is 666704501. The reversal of 666704498 is 894407666.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 643789129 + 22915369 = 25373^2 + 4787^2 .

It is not an unprimeable number, because it can be changed into a prime (666704497) 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 as a sum of consecutive naturals, namely, 166676123 + ... + 166676126.

Almost surely, 2^666704498 is an apocalyptic number.

666704498 is a deficient number, since it is larger than the sum of its proper divisors (333352252).

666704498 is a wasteful number, since it uses less digits than its factorization.

666704498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333352251.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The square root of 666704498 is about 25820.6215649430. The cubic root of 666704498 is about 873.5969887806.

The spelling of 666704498 in words is "six hundred sixty-six million, seven hundred four thousand, four hundred ninety-eight".