66228005727 has 16 divisors (see below), whose sum is σ = 105662915680. Its totient is φ = 40755695616.

The previous prime is 66228005653. The next prime is 66228005801. The reversal of 66228005727 is 72750082266.

It is an interprime number because it is at equal distance from previous prime (66228005653) and next prime (66228005801).

It is not a de Polignac number, because 66228005727 - 2¹¹ = 66228003679 is a prime.

It is a super-2 number, since 2×66228005727² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66228005027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94341538 + ... + 94342239.

It is an arithmetic number, because the mean of its divisors is an integer number (6603932230).

Almost surely, 2^66228005727 is an apocalyptic number.

66228005727 is a deficient number, since it is larger than the sum of its proper divisors (39434909953).

66228005727 is a wasteful number, since it uses less digits than its factorization.

66228005727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188683799 (or 188683793 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 66228005727 in words is "sixty-six billion, two hundred twenty-eight million, five thousand, seven hundred twenty-seven".