66972578600429 has 4 divisors (see below), whose sum is σ = 67011448351776. Its totient is φ = 66933708849084.

The previous prime is 66972578600357. The next prime is 66972578600491. The reversal of 66972578600429 is 92400687527966.

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 66972578600429 - 2²⁰ = 66972577551853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66972578650429) 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, 19434873089 + ... + 19434876534.

It is an arithmetic number, because the mean of its divisors is an integer number (16752862087944).

Almost surely, 2^{66972578600429} is an apocalyptic number.

It is an amenable number.

66972578600429 is a deficient number, since it is larger than the sum of its proper divisors (38869751347).

66972578600429 is a wasteful number, since it uses less digits than its factorization.

66972578600429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38869751346.

The product of its (nonzero) digits is 548674560, while the sum is 71.

The spelling of 66972578600429 in words is "sixty-six trillion, nine hundred seventy-two billion, five hundred seventy-eight million, six hundred thousand, four hundred twenty-nine".