66517210156 has 24 divisors (see below), whose sum is σ = 123263271936. Its totient is φ = 31299475200.

The previous prime is 66517210141. The next prime is 66517210183. The reversal of 66517210156 is 65101271566.

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 7 ways as a sum of consecutive naturals, for example, 886506 + ... + 958606.

It is an arithmetic number, because the mean of its divisors is an integer number (5135969664).

Almost surely, 2^66517210156 is an apocalyptic number.

It is an amenable number.

66517210156 is a deficient number, since it is larger than the sum of its proper divisors (56746061780).

66517210156 is a wasteful number, since it uses less digits than its factorization.

66517210156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85689 (or 85687 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 66517210156 in words is "sixty-six billion, five hundred seventeen million, two hundred ten thousand, one hundred fifty-six".