66168023613 has 8 divisors (see below), whose sum is σ = 88685938176. Its totient is φ = 43881062400.

The previous prime is 66168023561. The next prime is 66168023629. The reversal of 66168023613 is 31632086166.

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

It is not a de Polignac number, because 66168023613 - 2¹⁸ = 66167761469 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 (66168023653) 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, 57737668 + ... + 57738813.

It is an arithmetic number, because the mean of its divisors is an integer number (11085742272).

Almost surely, 2^66168023613 is an apocalyptic number.

It is an amenable number.

66168023613 is a deficient number, since it is larger than the sum of its proper divisors (22517914563).

66168023613 is a wasteful number, since it uses less digits than its factorization.

66168023613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115476675.

The product of its (nonzero) digits is 186624, while the sum is 42.

The spelling of 66168023613 in words is "sixty-six billion, one hundred sixty-eight million, twenty-three thousand, six hundred thirteen".