28066214537 has 4 divisors (see below), whose sum is σ = 28066622160. Its totient is φ = 28065806916.

The previous prime is 28066214489. The next prime is 28066214551. The reversal of 28066214537 is 73541266082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28066214537 - 2²⁴ = 28049437321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28066214567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72203 + ... + 247680.

It is an arithmetic number, because the mean of its divisors is an integer number (7016655540).

Almost surely, 2^28066214537 is an apocalyptic number.

It is an amenable number.

28066214537 is a deficient number, since it is larger than the sum of its proper divisors (407623).

28066214537 is an equidigital number, since it uses as much as digits as its factorization.

28066214537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407622.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 28066214537 in words is "twenty-eight billion, sixty-six million, two hundred fourteen thousand, five hundred thirty-seven".