66940850027 has 4 divisors (see below), whose sum is σ = 70464052680. Its totient is φ = 63417647376.

The previous prime is 66940849981. The next prime is 66940850143. The reversal of 66940850027 is 72005804966.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72005804966 = 2 ⋅36002902483.

It is a cyclic number.

It is not a de Polignac number, because 66940850027 - 2⁸ = 66940849771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66940850827) 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, 1761601298 + ... + 1761601335.

It is an arithmetic number, because the mean of its divisors is an integer number (17616013170).

Almost surely, 2^66940850027 is an apocalyptic number.

66940850027 is a deficient number, since it is larger than the sum of its proper divisors (3523202653).

66940850027 is a wasteful number, since it uses less digits than its factorization.

66940850027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3523202652.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 66940850027 in words is "sixty-six billion, nine hundred forty million, eight hundred fifty thousand, twenty-seven".