66516602 has 8 divisors (see below), whose sum is σ = 102471636. Its totient is φ = 32359392.

The previous prime is 66516589. The next prime is 66516613. The reversal of 66516602 is 20661566.

It can be written as a sum of positive squares in 2 ways, for example, as 44903401 + 21613201 = 6701^2 + 4649^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 449363 + ... + 449510.

Almost surely, 2^66516602 is an apocalyptic number.

66516602 is a deficient number, since it is larger than the sum of its proper divisors (35955034).

66516602 is a wasteful number, since it uses less digits than its factorization.

66516602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898912.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 66516602 is about 8155.7710855565. The cubic root of 66516602 is about 405.1756632680.

The spelling of 66516602 in words is "sixty-six million, five hundred sixteen thousand, six hundred two".