66227751099 has 48 divisors (see below), whose sum is σ = 98463456000. Its totient is φ = 42882067008.

The previous prime is 66227751053. The next prime is 66227751119. The reversal of 66227751099 is 99015772266.

66227751099 is a `hidden beast` number, since 6 + 622 + 7 + 7 + 5 + 1 + 0 + 9 + 9 = 666.

It is not a de Polignac number, because 66227751099 - 2⁹ = 66227750587 is a prime.

It is a super-2 number, since 2×66227751099² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (66227751049) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 12486082 + ... + 12491384.

It is an arithmetic number, because the mean of its divisors is an integer number (2051322000).

Almost surely, 2^66227751099 is an apocalyptic number.

66227751099 is a deficient number, since it is larger than the sum of its proper divisors (32235704901).

66227751099 is a wasteful number, since it uses less digits than its factorization.

66227751099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5664 (or 5661 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The spelling of 66227751099 in words is "sixty-six billion, two hundred twenty-seven million, seven hundred fifty-one thousand, ninety-nine".