66065661156 has 24 divisors (see below), whose sum is σ = 168167137824. Its totient is φ = 20019897280.

The previous prime is 66065661131. The next prime is 66065661223. The reversal of 66065661156 is 65116656066.

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, 250248585 + ... + 250248848.

It is an arithmetic number, because the mean of its divisors is an integer number (7006964076).

Almost surely, 2^66065661156 is an apocalyptic number.

66065661156 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

66065661156 is an abundant number, since it is smaller than the sum of its proper divisors (102101476668).

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

66065661156 is a wasteful number, since it uses less digits than its factorization.

66065661156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500497451 (or 500497449 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 66065661156 in words is "sixty-six billion, sixty-five million, six hundred sixty-one thousand, one hundred fifty-six".