66085039870 has 16 divisors (see below), whose sum is σ = 118965397248. Its totient is φ = 26431276960.

The previous prime is 66085039847. The next prime is 66085039873. The reversal of 66085039870 is 7893058066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66085039873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239569 + ... + 435388.

It is an arithmetic number, because the mean of its divisors is an integer number (7435337328).

Almost surely, 2^66085039870 is an apocalyptic number.

66085039870 is a deficient number, since it is larger than the sum of its proper divisors (52880357378).

66085039870 is a wasteful number, since it uses less digits than its factorization.

66085039870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684755.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 66085039870 in words is "sixty-six billion, eighty-five million, thirty-nine thousand, eight hundred seventy".