66622174665 has 16 divisors (see below), whose sum is σ = 106604885376. Its totient is φ = 35528691200.

The previous prime is 66622174609. The next prime is 66622174673. The reversal of 66622174665 is 56647122666.

It is not a de Polignac number, because 66622174665 - 2⁷ = 66622174537 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14901 + ... + 365330.

It is an arithmetic number, because the mean of its divisors is an integer number (6662805336).

Almost surely, 2^66622174665 is an apocalyptic number.

It is an amenable number.

66622174665 is a deficient number, since it is larger than the sum of its proper divisors (39982710711).

66622174665 is a wasteful number, since it uses less digits than its factorization.

66622174665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391920.

The product of its digits is 4354560, while the sum is 51.

The spelling of 66622174665 in words is "sixty-six billion, six hundred twenty-two million, one hundred seventy-four thousand, six hundred sixty-five".