28056666067 has 8 divisors (see below), whose sum is σ = 28594122480. Its totient is φ = 27521273760.

The previous prime is 28056666049. The next prime is 28056666097. The reversal of 28056666067 is 76066665082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28056666067 - 2²³ = 28048277459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28056666017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488568 + ... + 542965.

It is an arithmetic number, because the mean of its divisors is an integer number (3574265310).

Almost surely, 2^28056666067 is an apocalyptic number.

28056666067 is a deficient number, since it is larger than the sum of its proper divisors (537456413).

28056666067 is a wasteful number, since it uses less digits than its factorization.

28056666067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032053.

The product of its (nonzero) digits is 4354560, while the sum is 52.

The spelling of 28056666067 in words is "twenty-eight billion, fifty-six million, six hundred sixty-six thousand, sixty-seven".