66162354621 has 16 divisors (see below), whose sum is σ = 101897103168. Its totient is φ = 37739667200.

The previous prime is 66162354581. The next prime is 66162354767. The reversal of 66162354621 is 12645326166.

It is a cyclic number.

It is not a de Polignac number, because 66162354621 - 2²¹ = 66160257469 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66162354821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58967670 + ... + 58968791.

It is an arithmetic number, because the mean of its divisors is an integer number (6368568948).

Almost surely, 2^66162354621 is an apocalyptic number.

It is an amenable number.

66162354621 is a deficient number, since it is larger than the sum of its proper divisors (35734748547).

66162354621 is a wasteful number, since it uses less digits than its factorization.

66162354621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117936492.

The product of its digits is 311040, while the sum is 42.

The spelling of 66162354621 in words is "sixty-six billion, one hundred sixty-two million, three hundred fifty-four thousand, six hundred twenty-one".