66552145745 has 4 divisors (see below), whose sum is σ = 79862574900. Its totient is φ = 53241716592.

The previous prime is 66552145729. The next prime is 66552145769. The reversal of 66552145745 is 54754125566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35572977664 + 30979168081 = 188608^2 + 176009^2 .

It is a cyclic number.

It is not a de Polignac number, because 66552145745 - 2⁴ = 66552145729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66552145693 and 66552145702.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6655214570 + ... + 6655214579.

It is an arithmetic number, because the mean of its divisors is an integer number (19965643725).

Almost surely, 2^66552145745 is an apocalyptic number.

It is an amenable number.

66552145745 is a deficient number, since it is larger than the sum of its proper divisors (13310429155).

66552145745 is a wasteful number, since it uses less digits than its factorization.

66552145745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13310429154.

The product of its digits is 5040000, while the sum is 50.

The spelling of 66552145745 in words is "sixty-six billion, five hundred fifty-two million, one hundred forty-five thousand, seven hundred forty-five".