66210717156 has 48 divisors (see below), whose sum is σ = 163597807296. Its totient is φ = 20769654784.

The previous prime is 66210717119. The next prime is 66210717187. The reversal of 66210717156 is 65171701266.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3126355 + ... + 3147461.

It is an arithmetic number, because the mean of its divisors is an integer number (3408287652).

Almost surely, 2^66210717156 is an apocalyptic number.

It is an amenable number.

66210717156 is an abundant number, since it is smaller than the sum of its proper divisors (97387090140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66210717156 is a wasteful number, since it uses less digits than its factorization.

66210717156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36508 (or 36506 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 42.

The spelling of 66210717156 in words is "sixty-six billion, two hundred ten million, seven hundred seventeen thousand, one hundred fifty-six".