66550061056156 has 24 divisors (see below), whose sum is σ = 117889971099264. Its totient is φ = 32867376798960.

The previous prime is 66550061056111. The next prime is 66550061056163. The reversal of 66550061056156 is 65165016005566.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18958890 + ... + 22193233.

It is an arithmetic number, because the mean of its divisors is an integer number (4912082129136).

Almost surely, 2^{66550061056156} is an apocalyptic number.

It is an amenable number.

66550061056156 is a deficient number, since it is larger than the sum of its proper divisors (51339910043108).

66550061056156 is a wasteful number, since it uses less digits than its factorization.

66550061056156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41157081 (or 41157079 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 52.

The spelling of 66550061056156 in words is "sixty-six trillion, five hundred fifty billion, sixty-one million, fifty-six thousand, one hundred fifty-six".