66507566156 has 24 divisors (see below), whose sum is σ = 121559882640. Its totient is φ = 31806637632.

The previous prime is 66507566143. The next prime is 66507566189. The reversal of 66507566156 is 65166570566.

It is a junction number, because it is equal to n+sod(n) for n = 66507566098 and 66507566107.

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, 3799535 + ... + 3816998.

It is an arithmetic number, because the mean of its divisors is an integer number (5064995110).

Almost surely, 2^66507566156 is an apocalyptic number.

It is an amenable number.

66507566156 is a deficient number, since it is larger than the sum of its proper divisors (55052316484).

66507566156 is a wasteful number, since it uses less digits than its factorization.

66507566156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7616633 (or 7616631 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 53.

The spelling of 66507566156 in words is "sixty-six billion, five hundred seven million, five hundred sixty-six thousand, one hundred fifty-six".