66131068610 has 16 divisors (see below), whose sum is σ = 119904801336. Its totient is φ = 26259343488.

The previous prime is 66131068609. The next prime is 66131068631. The reversal of 66131068610 is 1686013166.

It can be written as a sum of positive squares in 4 ways, for example, as 64694431201 + 1436637409 = 254351^2 + 37903^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 24134057 + ... + 24136796.

Almost surely, 2^66131068610 is an apocalyptic number.

66131068610 is a deficient number, since it is larger than the sum of its proper divisors (53773732726).

66131068610 is a wasteful number, since it uses less digits than its factorization.

66131068610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48270997.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 66131068610 in words is "sixty-six billion, one hundred thirty-one million, sixty-eight thousand, six hundred ten".